Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have a package import signature validation bypass allows which allows self-signed packages. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Path Traversal through the Report formatfile Parameter, causing arbitrary file read. This vulnerability occurs in two stages. In the first stage (stored injection), lib/htmlreports.php at line 283 stores $save['formatfile'] = $post['formatfile'] directly into the database without any validation. In the second stage (file read), lib/reports.php at line 667 concatenates CACTIPATHFORMATS . '/' . $formatfile, and line 670 then calls file($formatfile), reading arbitrary files from the filesystem. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have SQL Injection through unsanitized unserialize+implode in managers.php. At line 756 of managers.php, the application assigns $selecteditems by calling cactiunserialize(stripslashes(gnrv('selectedgraphsarray'))). The cactiunserialize() function calls unserialize() with allowedclasses set to false, which prevents object injection but still allows arbitrary string arrays to be deserialized. Then, at lines 760 to 766, the deserialized array values are passed directly into dbexecute('DELETE FROM snmpagentmanagers WHERE id IN (' . implode(',', $selecteditems) . ')'), where they are imploded into the SQL statement without any integer validation, resulting in SQL Injection when using SNMP agent management permissions. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing sessionregenerateid() after login, leading to Session Fixation. sessionregenerateid() is NOT called after successful login. The login flow at authlogin.php:203-207 directly sets $SESSION[SESSUSERID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Open Redirect through a substring check rather than a host check at strcontains($referer, CACTIPATHURL). When the user's loginopts == '1' (redirect to referer after login), the function used $SERVER['HTTPREFERER'] directly. An attacker could craft a referer such as https://evil.com/cacti/. Where CACTIPATHURL is /cacti/, the substring matches and the user is redirected to evil.com after login. The pre-existing validateredirecturl() helper at lib/htmlutility.php performed proper validation but was not invoked from authloginredirect(). This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Command Injection due to lack of sanitization in the escapecommand() function. The escapecommand() function at lib/rrd.php is a no-op: it returns $command unchanged. The command line built by rrdtoolfunctiongraph() is passed through this function and then to shellexec($fullcommandline). The risk is in rrdexecute() where textformat values from graph templates (which may contain host variable substitutions) reach shellexec without adequate escaping. This issue has been addressed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have a Stored SQL Injection vulnerability through graphnameregexp in the Reports feature. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. In versions 1.2.30 and prior, the rfilter request parameter is retrieved via the raw accessor grv() (rather than gfrv() with FILTERVALIDATEISREGEX validation) and concatenated directly into RLIKE SQL clauses in lib/htmlgraph.php and lib/htmltree.php, which are reachable pre-authentication through graphview.php on installations with guest graph viewing enabled. Because the unbalanced-quote payload bypasses the regex validation that would otherwise reject it, an unauthenticated attacker can inject arbitrary SQL to compromise the confidentiality, integrity, and availability of the database. This advisory is similar to GHSA-69gg-mjfm-jjpc. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have pre-authentication SQL Injection via unanchored FILTERVALIDATEREGEXP in graphview.php. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graphtheme and rrdtool IPC serialization hardening. This issue has been resolved in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Reflected XSS via tab parameter in the authprofile.php JavaScript context. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Path Traversal via filename parameter in packageimport.php. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and below contain a Reflected XSS vulnerability in the htmlauthfooter. This issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. In versions 1.2.30 and below, the locale-dependent decimal formatting in rrdtoolfunctionupdate() can corrupt RRDtool metric values. The rrdtoolfunctionupdate() function checks metric values with isnumeric() and concatenates them into the RRDtool update command via PHP string interpolation. PHP's string cast of floats is locale-sensitive: if LCNUMERIC uses comma as decimal separator (e.g., deDE), a value of 1.5 becomes "1,5". RRDtool expects . as decimal separator, causing metric data to shift into wrong columns or be silently dropped. No setlocale() reset is present in the update path. This causes a data integrity issue, but is not remotely exploitable; it requires server locale misconfiguration. The issue has been fixed in version 1.2.31.

Cacti is an open source performance and fault management framework. In versions 1.2.30 and prior, the rfilter request variable was concatenated into a RLIKE SQL clause without sanitization. The endpoint does not require authentication (graph viewing supports guest access via the configured guest user), so the SQLi was reachable pre-auth on installs with guest viewing enabled. This issue was fixed in version 1.2.31.

During recent testing on Cacti, an authenticated remote code execution vulnerability was discovered that allows users with graph management privileges to execute arbitrary commands on the underlying OS.

The vulnerability originates from Cacti's variable substitution engine, which allows graph templates to reference host metadata through variables such as |host\description|, |host\hostname|, and |host\notes|. During graph generation, these variables are expanded and incorporated into arguments passed to RRDtool.

Because user-controlled host metadata is substituted without sufficient validation or sanitization, an attacker can inject malicious input into a host field and trigger code execution when a graph is rendered.

This issue affects Cacti versions ≤ 1.2.30 and has been assigned CVE-2026-39949.

Link to the writeup: https://github.com/lukehebe/Vulnerability-Disclosures/blob/main/CVE-2026-39949.md Link to the POC: https://github.com/lukehebe/CVE-2026-39949/tree/main Link to Cacti changelog: https://github.com/Cacti/cacti/blob/develop/CHANGELOG#L231

A HTML injection vulnerability exists in the file upload functionality of Cacti <= 1.2.29. When a file with an invalid format is uploaded, the application reflects the submitted filename back into an error popup without proper sanitization. As a result, attackers can inject arbitrary HTML elements (e.g., <h1>, <b>, <svg>) into the rendered page. NOTE: Multiple third-parties including the maintainer have stated that they cannot reproduce this issue after 1.2.27.

Cacti is an open source performance and fault management framework. Prior to 1.2.29, there is an input-validation flaw in the SNMP device configuration functionality. An authenticated Cacti user can supply crafted SNMP community strings containing control characters (including newlines) that are accepted, stored verbatim in the database, and later embedded into backend SNMP operations. In environments where downstream SNMP tooling or wrappers interpret newline-separated tokens as command boundaries, this can lead to unintended command execution with the privileges of the Cacti process. This vulnerability is fixed in 1.2.29.

Cacti versions prior to 0.8.6-d contain a remote command execution vulnerability in the graphview.php script. An authenticated user can inject arbitrary shell commands via the graphstart GET parameter, which is improperly handled during graph rendering. This flaw allows attackers to execute commands on the underlying operating system with the privileges of the web server process, potentially compromising system integrity.

Cacti through 1.2.29 allows SQL injection in the template function in hosttemplates.php via the graphtemplate parameter. NOTE: this issue exists because of an incomplete fix for CVE-2024-54146.

Cacti is an open source performance and fault management framework. Some of the data stored in automationtreerules.php is not thoroughly checked and is used to concatenate the SQL statement in buildruleitemfilter() function from lib/apiautomation.php, resulting in SQL injection. This vulnerability is fixed in 1.2.29.

Cacti is an open source performance and fault management framework. An authenticated Cacti user can abuse graph creation and graph template functionality to create arbitrary PHP scripts in the web root of the application, leading to remote code execution on the server. This vulnerability is fixed in 1.2.29.

Cacti is an open source performance and fault management framework. Due to a flaw in multi-line SNMP result parser, authenticated users can inject malformed OIDs in the response. When processed by ssnetsnmpdiskio() or ssnetsnmpdiskbytes(), a part of each OID will be used as a key in an array that is used as part of a system command, causing a command execution vulnerability. This vulnerability is fixed in 1.2.29.

Cacti is an open source performance and fault management framework. Cacti has a SQL injection vulnerability in the getdiscoveryresults function of automationdevices.php using the network parameter. This vulnerability is fixed in 1.2.29.

Cacti is an open source performance and fault management framework. Cacti has a SQL injection vulnerability in the template function of hosttemplates.php using the graphtemplate parameter. This vulnerability is fixed in 1.2.29.

Cacti is an open source performance and fault management framework. Prior to 1.2.29, an administrator can change the Poller Standard Error Log Path parameter in either Installation Step 5 or in Configuration->Settings->Paths tab to a local file inside the server. Then simply going to Logs tab and selecting the name of the local file will show its content on the web UI. This vulnerability is fixed in 1.2.29.

Cacti is an open source performance and fault management framework. An admin user can create a device with a malicious hostname containing php code and repeat the installation process (completing only step 5 of the installation process is enough, no need to complete the steps before or after it) to use a php file as the cacti log file. After having the malicious hostname end up in the logs (log poisoning), one can simply go to the log file url to execute commands to achieve RCE. This issue has been addressed in version 1.2.28 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Cacti is an open source performance and fault management framework. Theconsolenewsection parameter is not properly sanitized when saving external links in links.php . Morever, the said consolenewsection parameter is stored in the database and reflected back to user in index.php, finally leading to stored XSS. Users with the privilege to create external links can manipulate the “consolenewsection” parameter in the http post request while creating external links to perform stored XSS attacks. The vulnerability known as XSS (Cross-Site Scripting) occurs when an application allows untrusted user input to be displayed on a web page without proper validation or escaping. This issue has been addressed in release version 1.2.28. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Cacti is an open source performance and fault management framework. The title parameter is not properly sanitized when saving external links in links.php . Morever, the said title parameter is stored in the database and reflected back to user in index.php, finally leading to stored XSS. Users with the privilege to create external links can manipulate the title parameter in the http post request while creating external links to perform stored XSS attacks. The vulnerability known as XSS (Cross-Site Scripting) occurs when an application allows untrusted user input to be displayed on a web page without proper validation or escaping. This issue has been addressed in release version 1.2.28. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Cacti is an open source performance and fault management framework. The fileurl parameter is not properly sanitized when saving external links in links.php . Morever, the said fileurl is placed in some html code which is passed to the print function in link.php and index.php, finally leading to stored XSS. Users with the privilege to create external links can manipulate the fileurl parameter in the http post request while creating external links to perform stored XSS attacks. The vulnerability known as XSS (Cross-Site Scripting) occurs when an application allows untrusted user input to be displayed on a web page without proper validation or escaping. This issue has been addressed in release version 1.2.28. All users are advised to upgrade. There are no known workarounds for this issue.