Bug 2525779 (CVE-2026-81518)

Summary: CVE-2026-81518 mongosqld: mongosqld: Information disclosure due to insufficient client certificate verification
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: jcantril, rojacob
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in mongosqld. When mongosqld is configured to use client certificates for authentication, it requests a certificate during the TLS (Transport Layer Security) handshake but does not enforce its presence. This allows a remote attacker with network access to establish a session without presenting a client certificate. Consequently, the attacker can read MongoDB data exposed through the connector, leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-28 22:01:45 UTC 
When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.