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TI-2026-79448 Aliases CVE-2026-115361GHSA-fwx5-v4ww-26c8

ACL bypass in OpenBao drops templated deny rules

Priority LOW 11CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

OpenBao before 2.6.3 contains an ACL bypass in which explicit deny rules based on forbidden identity metadata templates are silently dropped when they sit within wildcard grants. An attacker whose identity metadata contains wildcard or path segments can reach paths that should be denied within the broader wildcard-granted scope. Exploitation requires high privileges and a high attack complexity, and the CVSS 4.0 base score is 2.1.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00205 10th percentileScored 2026-11-07
Fix Fixed openbao (openbao): 2.6.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
openbaoopenbaobefore 2.6.32.6.3Patch availableCNA
  • openbao Vendoropenbao Affected before 2.6.3 Fixed in 2.6.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*——openbao
  • cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:* Versions — — ·openbao

Remediation

Upgrade OpenBao to version 2.6.3 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA openbao (openbao) Fixed in 2.6.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    openbao 2.6.3

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-79452 Incorrect authorization in OpenBao policy cache allows cross-namespace accessPriority LOW 35
    • TI-2026-79447 Open redirect in OpenBao OIDC identity provider UIPriority LOW 30
    • TI-2026-79451 Missing authorization in OpenBao lets attackers stop Agent and ProxyPriority LOW 11
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-115361
  2. 2026-10-22 Alias added: GHSA-fwx5-v4ww-26c8
  3. 2026-11-03 Affected versions changed · Red Hat
  4. 2026-11-03 CVSS score added · Red Hat
  5. 2026-11-04 CISA SSVC decision points changed

References

Advisory 1

  • TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
  • TI-2026-34075 OpenBao's Inline Auth Incorrectly Redacted Headers CVSS 4.0MEDIUM 5.4
  • TI-2026-40259 OpenBao: LDAPi ldaputil (wrong escape func) CVSS 3.1MEDIUM 6.8
  • TI-2026-40265 OpenBao: Transit secrets engine crashes on key creation with `derived: true` for asymmetric key types CVSS 3.1MEDIUM 6.5
  • TI-2026-28381 OpenBao has Decompression Bomb via Unbounded Copy in OCI Plugin Extraction (DoS) CVSS 3.1MEDIUM 6.5
  • TI-2026-45068 OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack CVSS 4.0CRITICAL 9.2
See all 48 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences