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No exploitation reportedFix available

CVE-2026-81525

No exploitation reported by the sources we read.

  • Published2026-08-27
  • Fixed in2.4.1 · 1.21.6 · 1.21.4
  • WeaknessCWE-943

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

The MongoDB client library for PHP does not sufficiently sanitize special elements in application-supplied namespace identifiers before using them to construct the target namespace for database operations. An application that incorporates untrusted text into these identifiers may have operations silently directed at a different storage location than the one the application intended.

Timeline

dates in UTC
  1. 2026-08-2720:18CVE publishedNVD

Versions per branch

NVD · OSV
Mongodb php driver
BranchAffectedFixed in
2.x≥ 2.0.0, < 2.4.12.4.1
1.21< 1.21.61.21.6
1.21< 1.21.41.21.4
Mongodb php library
BranchAffectedFixed in
2.x≥ 2.0.0, < 2.4.12.4.1
1.21< 1.21.41.21.4

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

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

  • mongodb/mongodbTuxCare:Packagistfrom 1.9.0 · fixed in 1.9.0-p1+tuxcare
  • 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

3 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Mongodb php driver to 2.4.1 · 1.21.6 · 1.21.4

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 decisionnone2026-08-28
  • CNACVSS 4.08.6known since 2026-10-23
  • CNACVSS 3.18.1known since 2026-10-23
  • CNAweakness (CWE)CWE-943known since 2026-10-23
  • FIRST EPSSEPSS score0.5 %2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2026-09-08

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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
2026-08-27
Last Modified
2026-09-29
NVD status
Analyzed
GitHub Advisory
GHSA-65fr-j4p9-vc33

Frequently asked questions

What is CVE-2026-81525?

The MongoDB client library for PHP does not sufficiently sanitize special elements in application-supplied namespace identifiers before using them to construct the target namespace for database operations. An application that incorporates untrusted text into these identifiers may have operations silently directed at a different storage location than the one the application intended.

Is CVE-2026-81525 actively exploited?

Active exploitation of CVE-2026-81525 has not been confirmed. Its EPSS score was 0.5% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-81525?

CVE-2026-81525 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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