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Critical, CVSS 9.1amended

OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack

CVE-2026-63132GHSA-34fc-gh42-pj53

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Go github.com/openbao/openbao

    Affected
    < 0.0.0-20260713141742-763625a20721>= 0.1.0, <= 1.1.5
    Fixed in
    0.0.0-20260713141742-763625a20721

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.1 · 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 · score source
EPSS
  • CVE-2026-63132: 0.63% estimated exploitation activity in the next 30 days; percentile 50.18 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 4 · amended ·

    Amended from ghsa record GHSA-34fc-gh42-pj53

  2. Revision 3 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 2 · amended ·

    Amended from osv record GO-2026-6553

  4. Revision 1 · created ·

    Published from osv record GHSA-34fc-gh42-pj53

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-63132

Advisory: OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack
IDs: CVE-2026-63132, GHSA-34fc-gh42-pj53
Record: https://patchnext.com/advisories/cve-2026-63132 (revision 4, source checked 26 Oct 2026, 15:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: github.com/openbao/openbao 0.0.0-20260713141742-763625a20721. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/openbao/openbao: affected < 0.0.0-20260713141742-763625a20721; >= 0.1.0, <= 1.1.5; fixed in 0.0.0-20260713141742-763625a20721

## Suggested inspection (read-only)
- Go github.com/openbao/openbao: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/openbao/openbao.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-34fc-gh42-pj53 (OSV record GHSA-34fc-gh42-pj53 lists affected ranges: Go github.com/openbao/openbao >=0 =0.1.0 <=1.1.5)
- Verified: https://osv.dev/vulnerability/GO-2026-6553 (OSV record GO-2026-6553 lists affected ranges: Go github.com/openbao/openbao >=0 =0.1.0)
- Verified: https://github.com/advisories/GHSA-34fc-gh42-pj53 (GitHub-reviewed advisory GHSA-34fc-gh42-pj53 lists affected ranges: Go github.com/openbao/openbao >=0 =0.1.0 <=1.1.5)

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