Jenkins Active Directory Plugin 2.41 and earlier deserializes data from LDAP referrals without validation.
Jenkins Active Directory Plugin 2.41.1 and earlier does not escape the user name before building the LDAP search filter in the Windows native (ADSI) authentication path, allowing unauthenticated attackers to inject LDAP wildcard characters to enumerate directory entries and to authenticate as a matching user whose password they know without knowing their exact user name.
Jenkins is an open source automation server which enables developers around the world to reliably build, test, and deploy their software.
The following releases contain fixes for security vulnerabilities:
Active Directory Plugin 2.41.1 AppSpider Plugin 1.0.18 Bitbucket OAuth Plugin 0.18 Credentials Binding Plugin 725.ve52b2328afde Email Extension Plugin 1933.1935.v276319e3cc47 GitHub Integration Plugin 0.7.4 Job Import Plugin 143.145.v48f9aa6ff384 LDAP Plugin 807.809.vd3a4e5e4ec98 Multijob Plugin 669.v9d96ad9c71b0 Pipeline: Groovy Libraries Plugin 798.v5cc688825312
Additionally, we announce unresolved security issues in the following plugins:
buildgraph-view Plugin
Summaries of the vulnerabilities are below. More details, severity, and attribution can be found here: https://www.jenkins.io/security/advisory/2026-05-27/
We provide advance notification for security updates on this mailing list: https://groups.google.com/d/forum/jenkinsci-advisories
If you discover security vulnerabilities in Jenkins, please report them as described here: https://www.jenkins.io/security/#reporting-vulnerabilities
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SECURITY-3654 / CVE-2026-48916 (SSRF) & CVE-2026-48917 (deserialization) LDAP Plugin 807.v7d7de30930cf and earlier follows LDAP referrals from the configured LDAP server. These can forward to an RMI URL that causes Jenkins to deserialize attacker-controlled data, resulting in Remote Code Execution (RCE) on the Jenkins controller if deserialization "gadgets" are available on the classpath.
This allows attackers able to control the configured LDAP server, or able to perform a machine-in-the-middle attack, to execute code on the Jenkins controller.
SECURITY-3659 / CVE-2026-48918 (SSRF) & CVE-2026-48919 (deserialization) Active Directory Plugin 2.41 and earlier follows LDAP referrals from the configured Active Directory server by default. These can forward to an RMI URL that causes Jenkins to deserialize attacker-controlled data, resulting in Remote Code Execution (RCE) on the Jenkins controller if deserialization "gadgets" are available on the classpath.
This allows attackers able to control the configured Active Directory server, or able to perform a machine-in-the-middle attack, to execute code on the Jenkins controller.
SECURITY-3705 / CVE-2026-48920 Email Extension Plugin 1933.v45cec755423f and earlier includes a feature that allows inlining images as base64 in email content by setting the data-inline attribute. No restrictions are placed on the image URLs that can be inlined.
This allows attackers able to control the email content to specify file: URLs for images to read arbitrary files from the Jenkins controller filesystem.
SECURITY-3727 / CVE-2026-48921 Pipeline: Groovy Libraries Plugin 797.v90eaa9be45a0 and earlier does not prohibit symbolic links in shared libraries.
This allows attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.
SECURITY-3790 / CVE-2026-48922 Credentials Binding Plugin 720.v3f6decef43ea and earlier does not properly sanitize file names for file and zip file credentials.
This allows attackers able to provide credentials to a job to write files to arbitrary locations on the node filesystem. If Jenkins is configured to allow a low-privileged user to configure file or zip file credentials used for a job running on the built-in node, this can lead to remote code execution.
SECURITY-3671 / CVE-2026-48923 AppSpider Plugin 1.0.17 and earlier does not perform a permission check in a method implementing form validation.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL.
SECURITY-3761 / CVE-2026-48924 Bitbucket OAuth Plugin 0.17 and earlier does not restrict the redirect URL after login.
This allows attackers to perform phishing attacks by having users go to a Jenkins URL that will forward them to a different site after successful authentication.
SECURITY-3776 / CVE-2026-48925 GitHub Integration Plugin 0.7.3 and earlier does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnerability.
This vulnerability allows attackers to trigger a build for a pull request.
SECURITY-3781 / CVE-2026-9674 Multijob Plugin 662.vd2e0001f6bbd and earlier does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnerability.
This vulnerability allows attackers to resume failed Multijob builds.
SECURITY-3783 / CVE-2026-48926 Job Import Plugin 143.v044a2e819b27 and earlier does not perform a permission check in an HTTP endpoint.
This allows attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins. Those can be used as part of an attack to capture the credentials using another vulnerability.
SECURITY-3486 / CVE-2026-48927 buildgraph-view Plugin 1.8 and earlier does not escape the build URL.
This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to configure jobs or views.
As of publication of this advisory, there is no fix.
Jenkins is an open source automation server which enables developers around the world to reliably build, test, and deploy their software.
The following releases contain fixes for security vulnerabilities:
Active Directory Plugin 2.41.2 Bitbucket Push and Pull Request Plugin 3.3.9 Contrast Continuous Application Security Plugin 3.12 EC2 Fleet Plugin 4.2.3.540.va6eedb7bc112 External Workspace Manager Plugin 1.4.0 Git client Plugin 6.6.1 Git Parameter Plugin 462.463.v496a59f698e5 Gitee Plugin 1292.v2559f2f3f2c0 GitHub Branch Source Plugin 1967.1970.vd86979736546 Job Configuration History Plugin 1367.vc8fab15101dc MCP Server Plugin 0.178.vffe5ae770f3b Pipeline: Groovy Plugin 4331.4333.v50ab076c5199 Priority Sorter Plugin 936.937.v5581d0b2ccba Script Security Plugin 1402.1405.vc96e74964250
Additionally, we announce unresolved security issues in the following plugins:
Assembla Plugin FitNesse Plugin OWASP ZAP Plugin Zowe zDevOps Plugin
Summaries of the vulnerabilities are below. More details, severity, and attribution can be found here: https://www.jenkins.io/security/advisory/2026-06-24/
We provide advance notification for security updates on this mailing list: https://groups.google.com/d/forum/jenkinsci-advisories
If you discover security vulnerabilities in Jenkins, please report them as described here: https://www.jenkins.io/security/#reporting-vulnerabilities
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SECURITY-3792 / CVE-2026-57280 Script Security Plugin provides a sandbox feature that allows running user-provided scripts safely by intercepting and checking potentially unsafe operations.
Script Security Plugin 1402.v94c9ce464861 and earlier does not intercept the implicit type cast applied to each element of the iterated collection in a typed for loop (e.g. for (Type t in collection)), as this cast is performed during bytecode generation rather than in the transformed script AST.
This allows attackers able to provide sandboxed scripts to invoke constructors of arbitrary types without those invocations being checked by the sandbox, bypassing the sandbox protection. This can be used to execute arbitrary code on the Jenkins controller.
SECURITY-3793 / CVE-2026-57281 Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations such as @CompileStatic and @TypeChecked that carry an extensions member, which causes Groovy to load and execute a script from the classpath at compile time, before the sandbox is applied.
This may allow attackers able to define and run sandboxed scripts to execute code outside the sandbox, in the rare case that a suitable Groovy script is present on the classpath of the component that evaluates the script.
NOTE: The Jenkins security team has been unable to identify any Groovy source files in Jenkins core or plugins that would allow attackers to execute dangerous code. While the severity of this issue is declared as High due to the potential impact, successful exploitation is considered very unlikely.
SECURITY-3723 / CVE-2026-57282 Git client Plugin 6.6.0 and earlier does not correctly escape the workspace directory name when it is embedded into the SSH wrapper script generated by the "Manually provided keys" Git Host Key Verification strategy on Unix agents.
This allows attackers able to control the name of a build's working directory (e.g. through a build parameter that determines the workspace directory) to inject shell command substitution and execute arbitrary commands on the agent.
NOTE: This vulnerability only has an impact when attackers can control working directories (e.g., the argument to the dir(…) Pipeline step) while not being able to control the Pipeline itself or the programs or build scripts it executes.
NOTE: This vulnerability has been reported through the Jenkins Bug Bounty Program sponsored by the European Commission.
SECURITY-3677 / CVE-2026-57283 (CSRF) & CVE-2026-57284 (unrestricted instantiation of types) Pipeline: Groovy Plugin 4331.v9d06ed4658ff and earlier does not restrict the types that can be instantiated through the Pipeline Snippet Generator, instantiating any type with a constructor annotated with @DataBoundConstructor in response to a request.
This allows attackers to have Pipeline: Groovy Plugin instantiate types related to job or system configuration other than Pipeline steps.
Additionally, this HTTP endpoint can be accessed using the GET method and does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability. This allows attackers to create a script approval request attributed to another user, impersonating a trusted user when social engineering an administrator into approving a malicious script.
NOTE: This vulnerability has been reported through the Jenkins Bug Bounty Program sponsored by the European Commission.
SECURITY-3808 / CVE-2026-57285 GitHub Branch Source Plugin 1967.1969.v205fd594c821 and earlier does not perform a permission check in an HTTP endpoint that lists the GitHub API endpoints configured in the global plugin configuration.
This allows attackers with Overall/Read permission to obtain the URLs of GitHub Enterprise servers configured by administrators.
NOTE: This vulnerability has been reported through the Jenkins Bug Bounty Program sponsored by the European Commission.
SECURITY-3745 / CVE-2026-57286 Git Parameter Plugin 462.vdcf3df2ed2ca and earlier does not perform a permission check in an HTTP endpoint that populates the list of values for Git parameters by querying the SCM configured on a job, using the SCM credentials configured in Jenkins.
This allows attackers with Item/Read permission to obtain information about the SCM repository used by a job they would otherwise be unable to access, such as branch names, tag names, and revision metadata.
SECURITY-3742 / CVE-2026-57287 Job Configuration History Plugin 1356.ve360da6c523a and earlier does not redact the encrypted values of secrets when displaying historical job and agent configurations through its "View as XML" / "(RAW)" feature and its configuration diff views.
This allows attackers with Item/Extended Read permission (but not Item/Configure permission) to view the encrypted values of secrets, such as build trigger tokens, that Jenkins would otherwise redact from the configuration shown to them.
SECURITY-3651 / CVE-2026-57288 In Active Directory Plugin 2.41.1 and earlier, the Windows native (ADSI) authentication path does not escape the user name before building the LDAP search filter.
This allows unauthenticated attackers to inject LDAP wildcard characters into the user name, enabling them to enumerate directory user and group names, and to authenticate as a matching user when they know that user's password but not their exact user name.
SECURITY-3759 / CVE-2026-57300 MCP Server Plugin 0.177.v629fdb2557fe and earlier does not perform a permission check in the getReplayScripts MCP tool that returns the replay script of a Pipeline build.
This allows attackers with Item/Read permission to obtain the Pipeline script of jobs.
SECURITY-3856 / CVE-2026-57289 Bitbucket Push and Pull Request Plugin 3.3.8 and earlier unconditionally disables SSL/TLS certificate and hostname validation for the connections it makes to Bitbucket Server using Bearer token authentication.
Because the Bearer token is transmitted in these requests, this allows attackers able to intercept network traffic to capture the token and impersonate the Jenkins controller to Bitbucket Server.
SECURITY-3769 / CVE-2026-57290 Priority Sorter Plugin 936.v2c01c6b84449 and earlier does not require POST requests in an HTTP endpoint that saves the global job priority configuration.
This allows attackers to overwrite the global job priority configuration.
SECURITY-3762 (1) / CVE-2026-57291 (missing permission check) & CVE-2026-57292 (CSRF) Gitee Plugin 1288.v18bdebc9069b and earlier does not perform permission checks in several HTTP endpoints implementing form validation for its global configuration.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.
Additionally, these HTTP endpoints do not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.
SECURITY-3762 (2) / CVE-2026-57293 Gitee Plugin 1288.v18bdebc9069b and earlier does not correctly perform a permission check in an HTTP endpoint.
This allows attackers with global Item/Configure permission (while lacking Item/Configure permission on any particular job) to enumerate credentials IDs of credentials stored in Jenkins. Those can be used as part of an attack to capture the credentials using another vulnerability.
SECURITY-3774 / CVE-2026-57294 (missing permission check) & CVE-2026-57295 (CSRF) EC2 Fleet Plugin 4.2.3.539.v8fedff2a81c3 and earlier does not perform permission checks in several HTTP endpoints used to validate cloud configurations.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing AWS credentials stored in Jenkins.
Additionally, these HTTP endpoints do not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.
SECURITY-3777 / CVE-2026-57296 External Workspace Manager Plugin 1.3.2 and earlier does not reject .. path segments when validating the custom workspace path provided to the exwsAllocate Pipeline step, allowing the resulting workspace path to escape the configured disk mount point.
This allows attackers with Item/Configure permission to read arbitrary files on the Jenkins controller file system, which can lead to remote code execution.
SECURITY-3697 (1) / CVE-2026-57297 (missing permission check) & CVE-2026-57298 (CSRF) Contrast Continuous Application Security Plugin 3.11 and earlier does not perform a permission check in an HTTP endpoint that tests the connection to a Contrast TeamServer.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL using an attacker-specified username, API key, and service key.
Additionally, this HTTP endpoint does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.
SECURITY-3697 (2) / CVE-2026-57299 Contrast Continuous Application Security Plugin 3.11 and earlier does not perform permission checks in several HTTP endpoints that fill list box options with the names of the configured Contrast metadata.
This allows attackers with Overall/Read permission to enumerate the names of configured Contrast metadata.
SECURITY-3649 / CVE-2026-57301 OWASP ZAP Plugin 1.0.7 and earlier does not support distributed builds, causing the file operations and build process of its "Automatically build ZAP" feature to be performed on the Jenkins controller rather than on the agent the build is assigned to.
This allows attackers with Item/Configure permission to configure the feature to build an attacker-controlled project, executing arbitrary code on the Jenkins controller and bypassing any restriction confining the build to a specific agent.
As of publication of this advisory, there is no fix.
SECURITY-3555 / CVE-2026-57302 FitNesse Plugin 1.36 and earlier stores passwords unencrypted in job config.xml files on the Jenkins controller as part of its configuration.
These passwords can be viewed by users with Item/Extended Read permission or access to the Jenkins controller file system.
As of publication of this advisory, there is no fix.
SECURITY-3692 (1) / CVE-2026-57303 Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks when parsing responses from the configured Assembla server.
This allows attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.
As of publication of this advisory, there is no fix.
SECURITY-3692 (2) / CVE-2026-57304 (missing permission check) & CVE-2026-57305 (CSRF) Assembla Plugin 1.4 and earlier does not perform a permission check in an HTTP endpoint that tests the connection to an Assembla server.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL using an attacker-specified username and password.
Additionally, this HTTP endpoint does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.
NOTE: This does not allow exploiting the XML external entity (XXE) vulnerability described in the previous advisory entry.
As of publication of this advisory, there is no fix.
SECURITY-3747 / CVE-2026-57306 (CSRF) & CVE-2026-57307 (missing permission check) Zowe zDevOps Plugin 1.1.3.50.ve350c9b450b1 and earlier does not perform a permission check in an HTTP endpoint implementing a connection test.
This allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.
Additionally, this HTTP endpoint does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.
As of publication of this advisory, there is no fix.
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