CVE-2026-77285: OpenBao Agent Writes Secrets to Stdout

Severity: low (CVSS 2.4 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-23 · updated 2026-09-29
Weakness: CWE-532

Description

OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao Agent's exec rendering mode could write secrets from env_template to standard output when command/agent/exec/exec.go re-created the template runner after repeated rendering failures, primarily after num_retries was reached. A process supervisor, log collector, or local user able to read that output could obtain the rendered secret values. This issue is fixed in version 2.6.0.

Affected products

openbao: before 2.6.0

References

https://github.com/openbao/openbao/commit/90272575e5f58b3883fbb0ccb2238e9285722d1a
https://github.com/openbao/openbao/commit/ee3aa4aff72c5176cf02af21eac7158899080878
https://github.com/openbao/openbao/pull/3494
https://github.com/openbao/openbao/pull/3495
https://github.com/openbao/openbao/releases/tag/v2.6.0
https://github.com/openbao/openbao/security/advisories/GHSA-444v-8vxr-p36h

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