GitLab issued an urgent multi-version patch (19.5.1 and backports to 19.4.3, 19.3.6, 19.2.9, 19.1.9, 19.0.10, 18.11.13) addressing multiple security flaws and bugs, and strongly urges immediate upgrades for self-managed instances. The most critical fix closes CVE-2026-110264: an integer overflow in the regular expression compiler (Onigmo) that could allow unauthenticated remote code execution, rated CVSS 10.0 and backported to several supported branches. GitLab.com and Dedicated are already patched. Two detection signatures - Onigmo native worker crash and org-mode render error bursts - are provided to help identify exploitation attempts. Security disclosures will be public 90 days after release.
The release also contains high- and medium-severity fixes including CVE-2026-15723 (OmniAuth-to-LDAP auto-linking allowing account takeover, CVSS 8.2), CVE-2026-112212 (OAuth/OIDC discovery cache poisoning, CVSS 7.5), CVE-2026-12664 (GraphQL work-item email field leaking project email addresses, CVSS 6.8), and CVE-2026-16255 (incomplete enforcement of SAML/LDAP membership lock, CVSS 5.9). Additional remediation covers internal credential exposure, authorization bypasses in group milestones, AI feature enablement trust issues, cache leakage of confidential titles, and various access-control and cleanup bugs with lower CVSS scores. Individual reporters and internal team members are credited for discoveries.
Summary generated by AI from the linked article. hn.today is not affiliated with Hacker News or Y Combinator.