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No exploitation reportedFix available

CVE-2026-84968

No exploitation reported by the sources we read.

  • Published2026-09-03
  • Fixed in2.5.2 · 2.1.9 · 1.21.9
  • WeaknessCWE-125

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

An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.

Timeline

dates in UTC
  1. 2026-09-0318:17CVE publishedNVD

Versions per branch

NVD
Mongodb php driver
BranchAffectedFixed in
2.x≥ 2.2.0, < 2.5.22.5.2
2.x≥ 2.0.0, < 2.1.92.1.9
1.x≥ 1.15.0, < 1.21.91.21.9

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 PHP Driverother versions: not affected
    Affected
    • ≥ 1.15.0, < 1.21.8fixed in 1.21.8semver
    • ≥ 2.0.0, < 2.1.9fixed in 2.1.9semver
    • ≥ 2.2.0, < 2.5.1fixed in 2.5.1semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-09-04

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: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
  • php-mongodbDebian:14all versions · fixed in 2.5.3-1

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-84968 Red Hat Product Security

    php-pecl-mongodb: MongoDB PHP driver: Information Disclosure due to out-of-bounds read in BSON decoding

Full record on NVD

Fix

  1. Update Mongodb php driver to 2.5.2 · 2.1.9 · 1.21.9

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

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-09-03
  • CNACVSS 4.06.9known since 2026-10-23
  • CNACVSS 3.15.3known since 2026-10-23
  • CNAweakness (CWE)CWE-125known since 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-11-09
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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
2026-09-03
Last Modified
2026-09-10
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-84968?

An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.

Is CVE-2026-84968 actively exploited?

Active exploitation of CVE-2026-84968 has not been confirmed. Its EPSS score was 0.2% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-84968?

CVE-2026-84968 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

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