CVE-2026-115358: OpenBao before 2.6.3 Sensitive Data Leak in Audit Log via Malformed Parameters

Severity: low (CVSS 2.0 v3.1)
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: 2026-10-22 · updated 2026-10-29
Weakness: CWE-532

Description

OpenBao before 2.6.3 contains an information disclosure vulnerability that allows attackers to leak sensitive data into audit logs by sending malformed plugin parameters. Attackers can submit requests with malformed TypeKVPair or TypeHeader field values, causing error messages containing sensitive input to be recorded in audit logs.

Affected products

openbao: before 2.6.3 — fixed in 2.6.3

How to fix

Upgrade to a fixed version: openbao 2.6.3. Check the vendor advisory for mitigations.

References

https://github.com/openbao/openbao/security/advisories/GHSA-8xxq-mq9m-xmhw
https://www.vulncheck.com/advisories/openbao-before-2.6.3-sensitive-data-leak-in-audit-log-via-malformed-parameters

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