Vulnerability · Published Jan 22, 2026 · Assigned by GitHub_M
CVE-2026-24058Soft Serve has Critical Authentication Bypass
High 8.1
In plain English
A high-severity security flaw in soft-serve from charmbracelet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/charmbracelet/soft-serve | 0.11.3 | GHSA-pchf-49fh-w34r |
| Go | github.com/charmbracelet/soft-serve | 0.11.3 | GO-2026-4353 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| charmbracelet | soft-serve | < 0.11.3 |
Weakness: CWE-289 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U