CVE-2026-58426
Gitea Actions Artifacts V4 HMAC ambiguity enables cross-repo read and cross-task write.
Is CVE-2026-58426 being exploited?
Not confirmed. CVE-2026-58426 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.30% probability of exploitation in the next 30 days.
How severe is CVE-2026-58426?
CVE-2026-58426 is rated Critical with a CVSS score of 9.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-58426?
Yes. A fix has been recorded for CVE-2026-58426. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-58426 affect?
CVE-2026-58426 affects Gitea, Gitea Actions Artifacts V4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-58426?
Patch when released; restrict artifact access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Cross-repo artifact read and cross-task write via HMAC ambiguity; enables data exposure and CI tampering.
Immediate action required
- affected>= 1.22.0 and <= 1.26.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.