CVE-2026-63132: Github.com/openbao/openbao OpenBao's Recovery Mode Vulnerable To Vulnerability

CRITICAL
Advisory Identifier: GHSA-34fc-gh42-pj53
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CWE-208
Published
Advisory Summary

CVE-2026-63132 is a CRITICAL openbao's recovery mode vulnerable to vulnerability (CWE-208: Observable Timing Discrepancy) affecting Github.com/openbao/openbao libraries in the Go ecosystem. The issue involves openbao's recovery mode vulnerable to token leakage via timing attack. Remediation is available by upgrading affected packages to version 0.0.0-20260713141742-763625a20721.

CVE-2026-63132 at a Glance

CVE Identifier CVE-2026-63132
GHSA Identifier GHSA-34fc-gh42-pj53
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-208: Observable Timing Discrepancy
Affected Product Github.com/openbao/openbao
Package Ecosystem Go
Published Date
Last Updated

How to Fix CVE-2026-63132

To remediate this vulnerability, upgrade all affected Github.com/openbao/openbao dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/openbao/openbao fixed: 0.0.0-20260713141742-763625a20721 
Upgrade github.com/openbao/openbao to 0.0.0-20260713141742-763625a20721
github.com/openbao/openbao fixed: Latest secure release 
Upgrade github.com/openbao/openbao to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/openbao/openbao

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-63132, inspect your project dependencies for Github.com/openbao/openbao:

inspect dependencies for github.com/openbao/openbao

Analyze the terminal output to locate any version of Github.com/openbao/openbao in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20260713141742-763625a20721), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-208: Observable Timing Discrepancy, where two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. In Github.com/openbao/openbao, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact When running in the highly privileged recovery mode, OpenBao was vulnerable to a timing attack against the single recovery token. This allowed an attacker to extract the recovery token and use it to perform operations against the OpenBao instance, including reading or modification of data. ### Patches This has been patched in OpenBao v2.6.0.

CVE-2026-63132 Affected Github.com/openbao/openbao Versions

2 component(s)
Fixed Versions:
0.0.0-20260713141742-763625a20721
Product / Package Ecosystem Affected Versions Fixed Version
github.com/openbao/openbao
golang/github.com/openbao/openbao
Go
< 0.0.0-20260713141742-763625a20721
0.0.0-20260713141742-763625a20721
github.com/openbao/openbao
golang/github.com/openbao/openbao
Go
≥ 0.1.0
≤ 1.1.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openbao/openbao/security/advisories/GHSA-34fc-gh42-pj53
Github.com/openbao/openbao Source Repository REPOSITORY
https://github.com/openbao/openbao/pull/3388
Github.com/openbao/openbao Source Repository REPOSITORY
https://github.com/openbao/openbao/pull/3472
Security Fix Commit FIX COMMIT
https://github.com/openbao/openbao/commit/0f2d90c331f25d1c6cd108638da03f4c7bd949a8
Github.com/openbao/openbao Source Repository REPOSITORY
https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203
Github.com/openbao/openbao Source Repository REPOSITORY
https://github.com/openbao/openbao
Github.com/openbao/openbao Release RELEASE
https://github.com/openbao/openbao/releases/tag/v2.6.0

Frequently Asked Questions

What is CVE-2026-63132?
CVE-2026-63132 is a security vulnerability in Github.com/openbao/openbao involving OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack under CWE-208: Observable Timing Discrepancy.
Which Github.com/openbao/openbao versions are affected?
Affected versions include releases prior to 0.0.0-20260713141742-763625a20721 across affected packages: github.com/openbao/openbao.
What version fixes CVE-2026-63132?
Upgrading to 0.0.0-20260713141742-763625a20721 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/openbao/openbao affected?
Yes, github.com/openbao/openbao is affected in releases prior to 0.0.0-20260713141742-763625a20721, Latest secure release. Upgrade your dependency to 0.0.0-20260713141742-763625a20721, Latest secure release or later.
What CWE is associated with CVE-2026-63132?
CVE-2026-63132 is classified under CWE-208: Observable Timing Discrepancy (Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.).
How can I check Go dependencies for CVE-2026-63132?
Run the dependency tree command: 'inspect dependencies for github.com/openbao/openbao'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-34fc-gh42-pj53",
  "modified" : "2026-09-22T20:36:51Z",
  "published" : "2026-09-22T20:36:51Z",
  "aliases" : [ "CVE-2026-63132" ],
  "summary" : "OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack",
  "details" : "### Impact\n\nWhen running in the highly privileged recovery mode, OpenBao was vulnerable to a timing attack against the single recovery token. This allowed an attacker to extract the recovery token and use it to perform operations against the OpenBao instance, including reading or modification of data.\n\n### Patches\n\nThis has been patched in OpenBao v2.6.0.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/openbao/openbao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20260713141742-763625a20721"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/openbao/openbao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.0"
      }, {
        "last_affected" : "1.1.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openbao/openbao/security/advisories/GHSA-34fc-gh42-pj53"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openbao/openbao/pull/3388"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openbao/openbao/pull/3472"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openbao/openbao"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openbao/openbao/releases/tag/v2.6.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-208" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-22T20:36:51Z",
    "nvd_published_at" : null
  }
}