SB2026070163 - Multiple vulnerabilities in Gitea

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2026-58426)

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due a cross-task and cross-repository authorization bypass in Actions artifact handling. A remote user can read/write artifacts on the system.

2) Input validation error (CVE-ID: CVE-2026-27771)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an unspecified weakness in Gitea when handling requests. A remote attacker can send a crafted request to disclose sensitive information.

Remediation

Install update from vendor's website.

References

• https://github.com/go-gitea/gitea/security/advisories/GHSA-hg5r-vq93-9fv6
• https://github.com/go-gitea/gitea/security/advisories/GHSA-8qw8-rq86-9pc2