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Vulnerability · Published Sep 23, 2026 · Assigned by GitHub_M

CVE-2026-63132OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack

Critical 9.2

In plain English

A critical-severity security flaw in openbao from openbao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.2Critical
Exploit odds (30 days)0.6%top 49.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao's handleLogicalRecovery path in http/logical.go compared the highly privileged recovery token with ordinary string equality. A remote unauthenticated attacker able to make repeated recovery mode requests and measure response timing could infer the recovery token. The recovered token could then authorize recovery mode operations that read or modify OpenBao data. This issue is fixed in version 2.6.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/openbao/openbao0.0.0-20260713141742-763625a20721GHSA-34fc-gh42-pj53
Gogithub.com/openbao/openbaono fix listedGHSA-34fc-gh42-pj53
Gogithub.com/openbao/openbao0.0.0-20260713141742-763625a20721GO-2026-6553

Affected products (as reported)

VendorProductVersions
openbao openbao < 2.6.0

Weakness: CWE-208 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References