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.
References7
- github.com/hashicorp/vault/blob/main/CHANGELOG.md#203
- github.com/openbao/openbao/commit/0f2d90c331f25d1c6cd108638da03…
- github.com/openbao/openbao/commit/763625a2072103ea9e9122f2a8408…
- github.com/openbao/openbao/pull/3388
- github.com/openbao/openbao/pull/3472
- github.com/openbao/openbao/releases/tag/v2.6.0
- github.com/openbao/openbao/security/advisories/GHSA-34fc-gh42-p…
Metrics
- CVSS 4.0
-
9.2
CRITICAL
Score source: CNA
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 50 · as of 9 November 2026
- CWE
- CWE-208
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.