CVE-2026-24058: Soft Serve has Critical Authentication Bypass
Impact What kind of vulnerability is it? Who is impacted?
This issue impacts every Soft Serve instance.
A critical authentication bypass allows an attacker to impersonate any user (including Admin) by "offering" the victim's public key during the SSH handshake before authenticating with their own valid key. This occurs because the user identity is stored in the session context during the "offer" phase and is not cleared if that specific authentication attempt fails.
Patches Has the problem been patched? What versions should users upgrade to?
Yes, please upgrade to version 0.11.3 as soon as possible.
Workarounds Is there a way for users to fix or remediate the vulnerability without upgrading?
You need to upgrade
Other sources
Soft Serve is a self-hostable Git server for the command line. Versions 0.11.2 and below have a critical authentication bypass vulnerability that allows an attacker to impersonate any user (including admin) by "offering" the victim's public key during the SSH handshake before authenticating with their own valid key. This occurs because the user identity is stored in the session context during the "offer" phase and is not cleared if that specific authentication attempt fails. This issue has been fixed in version 0.11.3.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the impact of CVE-2026-24058?
CVE-2026-24058 is a critical authentication bypass vulnerability that allows attackers to impersonate any user, including administrators, on all instances of Soft Serve.
Who is affected by CVE-2026-24058?
Every instance of Soft Serve running versions up to and including 0.11.2 is affected by CVE-2026-24058.
How do I fix CVE-2026-24058?
To fix CVE-2026-24058, upgrade your Soft Serve instance to version 0.11.3 or later.
What versions of Soft Serve are vulnerable to CVE-2026-24058?
Soft Serve versions prior to 0.11.3 are vulnerable to CVE-2026-24058.
What type of vulnerability is CVE-2026-24058?
CVE-2026-24058 is classified as a critical authentication bypass vulnerability.