Role-Based Rate Limit Bypass in OpenBao by OpenBao
CVE-2026-115359

6.3MEDIUM

Key Information:

Vendor

Openbao

Status
Openbao
Vendor
CVE Published:
22 October 2026

What is CVE-2026-115359?

OpenBao's rate limit quota subsystem has a flaw that allows valid callers to bypass configured role-based rate limits. This vulnerability arises when role resolution fails for requests containing form-encoded bodies or forwarded certificates. Consequently, quota rules specific to backend roles are not enforced, enabling repeated issuance of tokens without counting against the intended limits.

Affected Version(s)

openbao 0 < 2.6.4

openbao 2.7.0 < 2.7.1

openbao 2.6.4

References

https://github.com/openbao/openbao/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/openbao-before-2.6.4...
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.