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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-pchf-49fh-w34r
Patch x_refsource_misc
https://github.com/charmbracelet/soft-serve/commit/8539f9ad39918b67d612a35785a2b4326efc8741
Release Notes x_refsource_misc
https://github.com/charmbracelet/soft-serve/releases/tag/v0.11.3
Scores
CVSS v3
9.8
EPSS
0.0005
EPSS Percentile
15.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-289
Status
published
Products (2)
charm/soft_serve
< 0.11.3
charmbracelet/soft-serve
0 - 0.11.3Go
Published
Jan 22, 2026
Tracked Since
Feb 18, 2026