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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-120684

MongoDB C Driver GridFS gap lets a shared writer recover a protected client's password

No exploitation reported by the sources we read.

  • Published2026-11-03
  • WeaknessCWE-908

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A memory-initialization flaw in the legacy GridFS file handling of the MongoDB C Driver can cause uninitialized process memory to be treated as valid file content and stored on the server. A database user holding ordinary write access to a shared storage area can arrange conditions under which an application later appends to such a file and writes that memory into records the same user is permitted to read, which may result in unintended disclosure of sensitive information from the application's process, including credentials.

Timeline

dates in UTC
  1. 2026-11-0318:40CVE publishedCNA

Versions per branch

Products declared by the CNA1 product

As mongodb, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • MongoDB C Driverother versions: not affected
    Affected
    • ≥ 1.25.0, ≤ 1.30.14no fix statedsemver
    • ≥ 2.0.0, ≤ 2.5.7no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-03

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mongo-c-driverUbuntu:Pro:24.04:LTSall versions · no fixed version listed
  • mongo-c-driverUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • mongo-c-driverUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • mongo-c-driverUbuntu:26.10all versions · no fixed version listed
  • mongo-c-driverUbuntu:26.04:LTSall versions · no fixed version listed
  • mongo-c-driveropenSUSE:Tumbleweedall versions · fixed in 2.5.8-1.1
  • mongo-c-driverDebian:14all versions · fixed in 2.5.8-1
  • mongo-c-driverDebian:13all versions · no fixed version listed

1 more package range on OSV.dev

Vendor advisories

  • CVE-2026-120684 Red Hat Product Security

    mongo-c-driver: mongo-c-driver: Information disclosure via uninitialized memory in legacy GridFS file handling

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-05
  • CISA-ADPSSVC decisionnone2026-11-03
  • OpenCVESSVC decisionnoneknown since 2026-11-09
  • CNACVSS 4.062026-11-03
  • CNACVSS 3.16.52026-11-03
  • CNAweakness (CWE)CWE-9082026-11-03
  • FIRST EPSSEPSS score0.3 %2026-11-09
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-11-03
Last Modified
2026-11-03
NVD status
Awaiting Analysis

Frequently asked questions

What is CVE-2026-120684?

A memory-initialization flaw in the legacy GridFS file handling of the MongoDB C Driver can cause uninitialized process memory to be treated as valid file content and stored on the server. A database user holding ordinary write access to a shared storage area can arrange conditions under which an application later appends to such a file and writes that memory into records the same user is permitted to read, which may result in unintended disclosure of sensitive information from the application's process, including credentials.

Is CVE-2026-120684 actively exploited?

Active exploitation of CVE-2026-120684 has not been confirmed. Its EPSS score was 0.3% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-120684?

CVE-2026-120684 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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