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TI-2026-79446 Aliases CVE-2026-115359GHSA-4pgx-x639-9642

OpenBao Role-Based Rate Limit Quota Bypass via Request Parsing

Priority LOW 27CWE-799Published · Updated

Key facts

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

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

Summary

OpenBao before 2.6.4 and 2.7.0 before 2.7.1 fails to resolve roles for requests with form-encoded bodies or forwarded certificates, so quota rules scoped to backend-specific roles are not enforced (CWE-799). Valid callers can repeatedly issue tokens without consuming the configured role-based rate limit budget. CVSS 4.0 base score 6.3 (MEDIUM); CISA SSVC marks exploitation as none and automatable as no.

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

Description from the CNA

OpenBao before 2.6.4 and 2.7.x before 2.7.1 contains a flaw in its rate limit quota subsystem where role resolution fails for requests with form-encoded bodies or forwarded certificates, so quota rules scoped to backend-specific roles are not enforced. Valid callers can repeatedly issue tokens without consuming the configured role-based rate limit budget.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00187 8th 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
openbaoopenbaobefore 2.6.4; 2.7.0 to before 2.7.12.6.4, 2.7.1Patch availableCNA
  • openbao Vendoropenbao Affected 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, depending on the release branch in use.

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-2026-79443 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
    • TI-2026-79444 OpenBao drops response audit logs for root generation and rekeyPriority 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-2026-115359
  2. 2026-10-22 Alias added: GHSA-4pgx-x639-9642
  3. 2026-10-23 Priority changed: MEDIUM → LOW
  4. 2026-10-29 CISA SSVC decision points changed
  5. 2026-11-03 Affected versions changed · Red Hat
  6. 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