Is there a public exploit for CVE-2026-120807?

No public exploit for CVE-2026-120807 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-120807?

CVE-2026-120807 scores CVSS 7.5 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.23%.

What does CVE-2026-120807 affect?

CVE-2026-120807 affects MONGODB MongoDB Server.

7.5 High

A flaw in MongoDB’s X.509 cluster-membership authentication guard could allow a holder of a cluster-member certificate to gain elevated…

CVE-2026-120807

A flaw in MongoDB’s X.509 cluster-membership authentication guard could allow a holder of a cluster-member certificate to gain elevated internal privileges when a specific deployment configuration is in use. An internal check, which prevents a certificate recognized as a cluster member from also being treated as a regular user, does not correctly distinguish between certain error conditions encountered during user lookup. Under certain timing conditions, this can cause the check to be bypassed, granting the connection full internal system privileges. Triggering this issue requires possession of a valid cluster-member TLS certificate, non-default X.509 cluster authentication configuration, and specific conditions during the user cache lookup process.

Assessment

CVSS: 7.5 (v4.0)
Severity: High
EPSS: 0.23% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 13 November 2026
Affected: MONGODB · MongoDB Server
Assigner: mongodb

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

https://jira.mongodb.org/browse/SERVER-130169

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