by Kastro
Paper/Archive/CVE-2026-24058

CVE-2026-24058

charmbracelet soft-serve — Soft Serve has Critical Authentication Bypass

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 47.6.476 × 209.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
soft-serve< 0.11.3–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.1CVSS: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
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/charmbracelet/soft-serve/security/advisories/GHSA-pchf-49fh-w34rrefgithub.com/charmbracelet/soft-serve/commit/8539f9ad39918b67d612a35785a2b4326efc8741refgithub.com/charmbracelet/soft-serve/releases/tag/v0.11.3