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OpenBao and Vault Leak []byte Fields in Audit LogsGHSA-rc54-2g2c-g36g

Fix: openbao/openbao@cc2c476

GHSA-rc54-2g2c-g36g is a CWE-532 vulnerability in github.com/openbao/openbao. A fix is available for github.com/openbao/openbao — see the affected versions and patch details below.

Also known asBIT-openbao-2025-62705CVE-2025-62705GO-2025-4052
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-rc54-2g2c-g36g.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs26th percentile — riskier than 26% of all scored CVEsHighest risk
0.00%0.28%0.55%0.83%0.0%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected
🐹github.com/openbao/openbao

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

OpenBao's audit log did not appropriately redact fields when relevant subsystems sent []byte response parameters rather than strings. This includes, but is not limited to:

  • sys/raw with use of encoding=base64, all data would be emitted unredacted to the audit log.
  • Transit, when performing a signing operation with a derived Ed25519 key, would emit public keys to the audit log.

Third-party plugins may be affected.

This issue has been present since HashiCorp Vault and continues to impact Vault as of v1.20.4.

Patches

OpenBao v2.4.2 will patch this issue.

Workarounds

If users do not use the above functionality, they are not impacted. To prohibit the use of sys/raw globally, ensure raw_storage_endpoint=false is set or missing from the server configuration.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/openbao/openbaoall versions0.0.0-20251022165510-cc2c476bac66go get github.com/openbao/openbao@v0.0.0-20251022165510-cc2c476bac66

Affected Products

1 product · 1 configurations
Application
openbaoopenbao
< 2.4.2
range

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/openbao/openbao, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/openbao/openbao to 0.0.0-20251022165510-cc2c476bac66 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rc54-2g2c-g36g is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact OpenBao's audit log did not appropriately redact fields when relevant subsystems sent `[]byte` response parameters rather than `string`s. This includes, but is not limited to: - `sys/raw` with use of `encoding=base64`, all data would be emitted unredacted to the audit log. - Transit, when performing a signing operation with a derived Ed25519 key, would emit public keys to the audit log. Third-party plugins may be affected. This issue has been present since HashiCorp Vault and continues to impact Vault as of v1.20.4. ### Patches OpenBao v2.4.2 will patch this issue. ### Worka
O3 Security · Impact-Aware SCA

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OpenBao and Vault Leak []byte Fields in Audit Logs