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No exploitation reportedAwaiting NVD analysis

CVE-2026-118383

Pre-authentication use-after-free in MongoDB Server replica set primary catch-up

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-416

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 use-after-free in the replication component of MongoDB Server can occur when a newly elected replica set primary completes catch-up. The condition can be caused by requests that do not require authentication, and may result in the server terminating unexpectedly or, under certain conditions, arbitrary code execution in the context of the server process. Replica set members are affected, including the shard and config server replica set members of sharded clusters; standalone mongod instances are not.

Timeline

dates in UTC
  1. 2026-11-1020:23CVE publishedCNA

Versions per branch

Products declared by the CNA

As mongodb, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • MongoDB Serverother versions: not affected
    Affected
    • ≥ 9.0.0, < 9.0.7fixed in 9.0.7semver
    • ≥ 8.3.0, < 8.3.16fixed in 8.3.16semver
    • ≥ 8.0.0, < 8.0.37fixed in 8.0.37semver
    • ≥ 7.0.0, < 7.0.48fixed in 7.0.48semver
    • ≥ 6.0.0, < 6.0.30fixed in 6.0.30semver
    • ≥ 5.0.0, < 5.0.35fixed in 5.0.35semver
    • ≥ 4.4.0, < 4.4.32fixed in 4.4.32semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-118383 yet.

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
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-10
  • CNACVSS 4.09.52026-11-10
  • CNACVSS 3.192026-11-10
  • CNAweakness (CWE)CWE-4162026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
2026-11-10
Last Modified
2026-11-10
NVD status
Awaiting Analysis

Frequently asked questions

What is CVE-2026-118383?

A use-after-free in the replication component of MongoDB Server can occur when a newly elected replica set primary completes catch-up. The condition can be caused by requests that do not require authentication, and may result in the server terminating unexpectedly or, under certain conditions, arbitrary code execution in the context of the server process. Replica set members are affected, including the shard and config server replica set members of sharded clusters; standalone mongod instances are not.

Is CVE-2026-118383 actively exploited?

Active exploitation of CVE-2026-118383 has not been confirmed.

What is the CVSS score for CVE-2026-118383?

CVE-2026-118383 has a CVSS v3 base score of 9 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

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