# CVE-2026-126312: OpenBao before 2.6.5 and 2.7.2 ACL Bypass via Non-Canonical Plugin Paths

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

OpenBao before 2.6.5 and 2.7.x before 2.7.2, and the openbao-plugins LDAP and RADIUS auth plugins before 0.2.0, contain an ACL bypass in the AppRole, Cert, LDAP, and RADIUS auth methods caused by implicit path canonicalization. Authenticated attackers can request non-canonical paths for AppRole Role IDs, Cert CRLs, LDAP groups and users, or RADIUS users to evade ACL deny rules.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- openbao / openbao (github.com/openbao/openbao/v2): ≥ 0; < 2.6.5 (affected, semver); 2.6.5 (unaffected, semver); ≥ 2.7.0; < 2.7.2 (affected, semver); 2.7.2 (unaffected, semver). Source: CNA: VulnCheck
- openbao / openbao (github.com/openbao/openbao-plugins/auth/ldap): ≥ 0; < 0.2.0 (affected, semver); 0.2.0 (unaffected, semver). Source: CNA: VulnCheck
- openbao / openbao (github.com/openbao/openbao-plugins/auth/radius): ≥ 0; < 0.2.0 (affected, semver); 0.2.0 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7.6 (high); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L; source: CNA: VulnCheck

- CVSS 4.0: 7.6 (high); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-178

## Exploit evidence

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

## References

- https://github.com/openbao/openbao/security/advisories/GHSA-736f-82w7-hj22 (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/openbao-before-2.6.5-and-2.7.2-acl-bypass-via-non-canonical-plugin-paths (CNA: VulnCheck; third-party-advisory)

- https://github.com/openbao/openbao/security/advisories/GHSA-736f-82w7-hj22 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/openbao-before-2.6.5-and-2.7.2-acl-bypass-via-non-canonical-plugin-paths (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-126312; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126312; retrieved 2026-11-13; source updated 2026-11-13

Revision: 4cd599232318330147a8a7a77699b067931749e68fbaeccf21a94c91c12bf141

Canonical: https://y2.dev/cve/CVE-2026-126312

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.