{"id":"CVE-2026-40264","aliases":["GHSA-p49j-v9wc-wg57","BIT-openbao-2026-40264","GO-2026-5526"],"title":"OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation","summary":"OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation","severity":"low","vendor":"openbao","product":"github.com/openbao/openbao","ecosystem":"go","affected":["github.com/openbao/openbao < 0.0.0-20260420162526-f58111d2ca54"],"patched":["github.com/openbao/openbao 0.0.0-20260420162526-f58111d2ca54"],"published":"2026-04-21","updated":"2026-07-27","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-p49j-v9wc-wg57","references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40264"},{"url":"https://github.com/openbao/openbao/pull/2934"},{"url":"https://github.com/openbao/openbao/commit/059cc5950303688335d5c8ab9af8e453795d693a"},{"url":"https://github.com/openbao/openbao"},{"url":"https://github.com/openbao/openbao/releases/tag/v2.5.3"}],"tags":["osv","go"],"epss":0.00301,"epssPercentile":0.22953,"ingestedAt":"2026-07-27T19:08:54.961Z","slug":"CVE-2026-40264","body":"## Overview\n\n### Impact\n\nOpenBao's namespaces provide multi-tenant separation. A tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant.\n\n### Patches\n\nThis was addressed in v2.5.3.\n\n## Affected packages\n\n- `github.com/openbao/openbao < 0.0.0-20260420162526-f58111d2ca54`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/openbao/openbao 0.0.0-20260420162526-f58111d2ca54`","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":13.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}