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VulnerabilityPublished

CVE-2026-9735: MongoDB Server · Sensitive Data in Logs

Affects MongoDB ServerSource CVE Database V5

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Not known to be exploited · CVSS 6.8 Medium : upgrade to 8.3.3 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
6.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 8.3.3
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Jun 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 30 Oct 2026.

What to do

Upgrade MongoDB Server to 8.3.3.

Affected software

ProductAffectedFixed in
MongoDBMongoDB ServerAffected
  • >=8.3.0 <8.3.3
Fixed in
  • 8.3.3

AI-suggested

If you cannot patch yet, it is recommended to disable connection health metric logging or restrict access to server logs to trusted administrators only to reduce the risk of credential exposure.

Description

MongoDB server may log authentication parameters, including credentials, to the server log during SASL authentication. When connection health metric logging is enabled, the full authentication parameters are written to the log without redaction.

References

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