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CVE-2026-120808VulnerabilityPublished

MongoDB's macOS TLS client implementation · Issue Exists

Source GCVE Database

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Authoritative record:CVE-2026-120808· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical · fixed in 9.0.7 : patch MongoDB Server as a priority.

Data as of 10 Nov 2026, 23:32 UTC

CVSS 4.0 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (mongodb)CVSS 4.09.1
CNA (mongodb)CVSS 3.17.4
Patch
Available – fixed in 9.0.7, 8.3.16, 8.0.37 +1
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade MongoDB Server to 9.0.7, 8.3.16, 8.0.37 or 7.0.48.

Affected software

ProductAffectedFixed in
MongoDBMongoDB ServerAffected
  • >=9.0.0 <9.0.7
Fixed in
  • 9.0.7
MongoDBMongoDB ServerAffected
  • >=8.3.0 <8.3.16
Fixed in
  • 8.3.16
MongoDBMongoDB ServerAffected
  • >=8.0.0 <8.0.37
Fixed in
  • 8.0.37
MongoDBMongoDB ServerAffected
  • >=7.0.0 <7.0.48
Fixed in
  • 7.0.48

AI-suggested

Since the vulnerability is specific to the Apple SecureTransport TLS backend on macOS, mitigation may include avoiding this TLS provider or disabling IPv6 connections if feasible. Monitor MongoDB vendor advisories for official patches or workarounds.

Description

MongoDB's macOS TLS client implementation using Apple SecureTransport improperly bypasses certificate chain-of-trust validation for outbound IPv6 connections. This allows an on-path attacker to present a self-signed certificate with the target's IPv6 address in the Subject Alternative Name and intercept or modify encrypted traffic. The issue affects only MongoDB processes running on macOS with this TLS provider.

References

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