CVE-2026-87720 PUBLISHED

Incorrect Authorization via Stale ProjectCache Eviction and Repeated .git Suffixes in Gerrit Code Review

Assigner: Google
Reserved: 09.09.2026 Published: 24.09.2026 Updated: 24.09.2026

Incorrect Authorization (CWE-863) in project name normalization (ProjectUtil.stripGitSuffix) and ProjectCache eviction logic (ProjectCacheImpl) in Gerrit Code Review versions 2.16.0 through 3.12.9, 3.13.0 through 3.13.8, and 3.14.0 through 3.14.2 allows an authenticated user (or an unauthenticated user if the repository was previously public) to cause unauthorized disclosure of private repository content and durable restoration of revoked project-owner administrative privileges via crafted requests using repeated .git suffixes (such as project.git.git) across REST APIs, Gitiles, or SSH Git commands. Because Gerrit strips only a single terminal .git suffix when constructing the logical ProjectCache key while JGit (FileKey.lenient) resolves the suffixed alias to the same canonical bare repository on disk, revoking read access or removing owner rules on the canonical project name fails to evict the cached alias ProjectState during the cache validity window, enabling reads of newly created private commits or writes to refs/meta/config. This issue is fixed in Gerrit Code Review versions 3.12.10, 3.13.9, and 3.14.3.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.6

Product Status

Vendor Gerrit
Product Gerrit
Versions Default: unaffected
  • affected from 2.16.0 to 3.12.10 (excl.)
  • affected from 3.13.0 to 3.13.9 (excl.)
  • affected from 3.14.0 to 3.14.3 (excl.)

Credits

  • Jaime Cavero finder

References

Problem Types

  • CWE-863 Incorrect Authorization CWE
  • CWE-613 Insufficient Session Expiration CWE
  • CWE-706 Use of Incorrectly-Resolved Name or Reference CWE

Impacts

  • CAPEC-180 Exploiting Incorrectly Configured Access Control Security Levels
  • CAPEC-233 Privilege Escalation