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TI-2026-79450 Aliases CVE-2026-115363GHSA-983h-5ch6-2726

OpenBao ACME EAB MAC Key Disclosure via Sanitized Configuration Endpoint

Priority LOW 10CWE-212Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

OpenBao from 2.2.0 before 2.6.4 and from 2.7.0 before 2.7.1 exposes the tls_acme_eab_mac_key value through the sys/config/state/sanitized endpoint. The flaw is improper removal of sensitive information before transfer (CWE-212), so the value is returned instead of being stripped. A caller with high privileges can read the ACME External Account Binding MAC key used for TLS listener certificates and bind to the operator's ACME account.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

OpenBao 2.2.0 before 2.6.4 and 2.7.0 before 2.7.1 contains an information disclosure vulnerability that exposes the tls_acme_eab_mac_key value through the sys/config/state/sanitized endpoint. Callers of the sanitized configuration endpoint can retrieve the ACME External Account Binding MAC key used for TLS listener certificates, letting them bind to the operator's ACME account.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00125 2nd percentileScored 2026-11-07
Fix Fixed openbao (openbao): 2.6.4, 2.7.1

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
openbaoopenbao2.2.0 to before 2.6.4; 2.7.0 to before 2.7.12.6.4, 2.7.1Patch availableCNA
  • openbao Vendoropenbao Affected 2.2.0 to before 2.6.4; 2.7.0 to before 2.7.1 Fixed in 2.6.4, 2.7.1 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 2.6.4 or 2.7.1. The sources list no advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA openbao (openbao) Fixed in 2.6.4, 2.7.1

Fixed in the same release

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

  • Release ·

    openbao 2.6.4, 2.7.1

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-79446 OpenBao Role-Based Rate Limit Quota Bypass via Request ParsingPriority LOW 27
    • TI-2026-79443 OpenBao Kubernetes Auth Token Renewal Keeps Access After Account DeletionPriority LOW 23
    • TI-2026-79449 OpenBao AppRole accepts expired Secret IDs until periodic tidyPriority LOW 11
    Show all 5 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-2026-115363
  2. 2026-10-22 Alias added: GHSA-983h-5ch6-2726
  3. 2026-10-29 CISA SSVC decision points changed
  4. 2026-11-03 Affected versions changed · Red Hat
  5. 2026-11-03 CVSS score added · Red Hat

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