VulnerabilityAnalyzed

CVE-2026-24058

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.

HIGH 8.1EPSS 0.55%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 4.0: 8.1 HIGHCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.55% probability · 45th percentile
CISA KEV: Not listed
Weakness: CWE-289
Affected: charm/soft serve
Source: security-advisories@github.com

References

https://github.com/charmbracelet/soft-serve/commit/8539f9ad39918b67d612a35785a2b4326efc8741Patch
https://github.com/charmbracelet/soft-serve/releases/tag/v0.11.3Product, Release Notes
https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-pchf-49fh-w34rVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.