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No exploitation reportedFix available

CVE-2026-6811

No exploitation reported by the sources we read.

  • Published2026-05-14
  • Fixed in2.1.8 · 1.21.5
  • WeaknessCWE-674

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

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Timeline

dates in UTC
  1. 2026-05-1422:16CVE publishedNVD

Versions per branch

NVD
Mongodb php driver
BranchAffectedFixed in
2.1≥ 2.1.0, < 2.1.82.1.8
1.21≥ 1.21.0, < 1.21.51.21.5

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

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

  • MongoDB Inc. PHP Driverother versions: not affected
    Affected
    • = 1.21.5no fix statedsemver
    • = 2.1.8no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-05-14

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

  • php-mongodbUbuntu:26.10all versions · no fixed version listed
  • php-mongodbUbuntu:26.04:LTSall versions · no fixed version listed
  • php-mongodbUbuntu:25.10all versions · no fixed version listed
  • php-mongodbUbuntu:24.04:LTSall versions · no fixed version listed
  • php-mongodbUbuntu:22.04:LTSall versions · no fixed version listed
  • php-mongodbUbuntu:20.04:LTSall versions · no fixed version listed
  • php-mongodbUbuntu:18.04:LTSall versions · no fixed version listed
  • php-mongodbUbuntu:16.04:LTSall versions · no fixed version listed

3 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Mongodb php driver to 2.1.8 · 1.21.5

Advisories and patches

Detection

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

Sources

  • CISA-ADPSSVC decisionnone2026-05-15
  • CNACVSS 4.06known since 2026-10-27
  • CNACVSS 3.15.9known since 2026-10-27
  • NVDCVSS 3.17.5read 2026-10-27
  • CNAweakness (CWE)CWE-674known since 2026-10-27
  • FIRST EPSSEPSS score0.4 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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
2026-05-14
Last Modified
2026-10-26
NVD status
Analyzed
GitHub Advisory
GHSA-vc69-vr6f-4x67

Frequently asked questions

What is CVE-2026-6811?

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Is CVE-2026-6811 actively exploited?

Active exploitation of CVE-2026-6811 has not been confirmed. Its EPSS score was 0.4% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-6811?

CVE-2026-6811 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record