# CVE-2026-115361: OpenBao before 2.6.3 ACL Bypass via Dropped Templated Policy Denial

Status: published. Published: 2026-10-22. Updated: 2026-11-04.

OpenBao before 2.6.3 contains an ACL bypass vulnerability that silently drops explicit deny rules based on forbidden identity metadata templates within wildcard grants. Attackers whose identity metadata contains wildcard or path segments can access paths that should be denied within the broader wildcard-granted scope.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- openbao / openbao (github.com/openbao/openbao/v2): ≥ 0; < 2.6.3 (affected, semver); 2.6.3 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 4.1 (medium); CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-04; percentile 10.64%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-863

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/openbao/openbao/security/advisories/GHSA-hr5j-3j78-4vh2 (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/openbao-before-2.6.3-acl-bypass-via-dropped-templated-policy-denial (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-115361; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115361; retrieved 2026-11-04; source updated Not reported

Revision: d311e7faf1c5ba10901a7c64da2dae061b45afcdc445683a06864b4e4208c13f

Canonical: https://y2.dev/cve/CVE-2026-115361

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