CVE-2026-24058: Charm Soft Serve

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Charm Soft Serve: before 0.11.3 (fixed in 0.11.3)

Published 2026-01-22. Last modified 2026-06-17.