Low severity · published Oct 22, 2026
CVE-2026-115358
OpenBao before 2.6.3 Sensitive Data Leak in Audit Log via Malformed Parameters
New
2.0
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openbao · openbao
before 2.6.3; before 2.6.3; 2.7.0 before 2.7.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115358
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115358
github.com
https://github.com/openbao/openbao/security/advisories/GHSA-8xxq-mq9m-xmhw
www.vulncheck.com
https://www.vulncheck.com/advisories/openbao-before-2.6.3-sensitive-data-leak-in-audit-log-via-malformed-parameters
More from openbao
9.8
CVE-2024-2048
Vault and Vault Enterprise (“Vault”) TLS certificate auth method did not correctly validate client certificates when configured with a non-CA certificate as trusted certificate
9.2
CVE-2026-63132
OpenBao's Recovery Mode Vulnerable To Token Leakage via Timing Attack
9.1
CVE-2025-54997
OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys
8.8
CVE-2024-7594
Vault’s SSH secrets engine did not require the valid_principals list to contain a value by default
8.3
CVE-2026-33757
OpenBao lacks user confirmation for OIDC direct callback mode