Vulnerability in Charm Soft Serve
CVE-2026-24058
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.
EPSS: 0.005 (43.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Charm Soft_serve
- Charmbracelet Soft-serve — versions < 0.11.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-24058?
- CVE-2026-24058 is a critical-severity vulnerability in Charm Soft Serve, classified under CWE-289. CVSS score: 9.8/10. Published 2026-01-22.
- How severe is CVE-2026-24058?
- Critical severity. CVSS v3 base score is 9.8 out of 10.