What is CVE-2026-58426?

CVE-2026-58426 is a critical-severity vulnerability in Gitea Open Source Git Server, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.6/10. Published 2026-07-03.

How severe is CVE-2026-58426?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Gitea Open Source Git Server

CVE-2026-58426

Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write

Published 2026-07-03 · last modified 2026-07-06.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.6th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Gitea Open Source Git Server — versions 1.22.0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
88ee5874-cf24-4952-aea0-31affedb7ff2 (patch)
88ee5874-cf24-4952-aea0-31affedb7ff2 (release-notes)
88ee5874-cf24-4952-aea0-31affedb7ff2 (vendor-advisory)

Frequently asked questions

What is CVE-2026-58426?: CVE-2026-58426 is a critical-severity vulnerability in Gitea Open Source Git Server, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.6/10. Published 2026-07-03.
How severe is CVE-2026-58426?: Critical severity. CVSS v3 base score is 9.6 out of 10.