9.2

CVE-2026-63132: openbao Observable Timing Discrepancy

CVSS: 9.2v4.0CriticalDeferred
AliasesGHSA-34fc-gh42-pj53BIT-openbao-2026-63132GO-2026-6553
Published 23-09-2026Last modified 23-09-2026
Open JSON

Vulnerability summary

CVE-2026-63132 is a critical (CVSS 9.2) Observable Timing Discrepancy vulnerability in openbao. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.2/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.50%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 23-09-2026
    PublishedVulnerability first disclosed.
  2. 23-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

24-09-202621-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/openbao1 product
  • openbao< 0.0.0-20260713141742-763625a20721 | ≥ 0.1.0, ≤ 1.1.5 | ≥ 0.1.0, < 0.0.0-20260713141742-763625a20721
Openbao1 product

2 vendors · 2 products

References

8 links