CVE-2026-81525

highpriority · track · 0EPSS 0.005 · 42 %ileDEUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.49% (42nd) EPSS

CVSS 8.1 · high

Is it mine?

19 products

Check your exposure

Who says so?

3 sources

cert_bund · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.2–8.6

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · cna@mongodb.comexploitability 2.8 · impact 5.2

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV

v4.08.6highCVSS: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:Xsecondary · cna@mongodb.com

v4.06.2mediumCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-943USCWE-943US

affected products (19)

Products and version ranges known to be affected.

Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source MongoDB≤ C Driver <2.5.1cert_bundDE
Open Source MongoDB≤ C# Driver <3.11.1cert_bundDE
Open Source MongoDB≤ C++ Driver <4.5.1cert_bundDE
Open Source MongoDB≤ GO Driver <2.8.2cert_bundDE
Open Source MongoDB≤ PHP Driver <1.21.6cert_bundDE
Open Source MongoDB≤ PHP Driver <2.4.1cert_bundDE
Open Source MongoDB≤ PHP Library <2.4.1cert_bundDE
Open Source MongoDB≤ Rust Driver <3.8.2cert_bundDE
Open Source MongoDB≤ libmongocrypt <1.20.3cert_bundDE
Open Source MongoDB≤ PHP Library <1.21.4cert_bundDE
Open Source MongoDB≤ BI Connector <2.14.30cert_bundDE
mongodb php driver< 1.21.6nvdUScpe:2.3:a:mongodb:php_driver:*:*:*:*:*:*:*:*
mongodb php driver2.0.0 → 2.4.1nvdUScpe:2.3:a:mongodb:php_driver:*:*:*:*:*:*:*:*
mongodb php library< 1.21.4nvdUScpe:2.3:a:mongodb:php_library:*:*:*:*:*:*:*:*
mongodb php library2.0.0 → 2.4.1nvdUScpe:2.3:a:mongodb:php_library:*:*:*:*:*:*:*:*
Packagist mongodb/mongodb< 1.21.4osvUSpkg:composer/mongodb/mongodb
Packagist mongodb/mongodb2.0.0 → 2.4.1osvUSpkg:composer/mongodb/mongodb

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3066MongoDB Clients: Mehrere SchwachstellenDeutsch2026-08-27csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen MongoDB Clients ausnutzen, um Sicherheitsvorkehrungen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder Denial-of-Service-Zustände herbeizuführen.
GHSA-65fr-j4p9-vc33mongodb: Reject "." and NUL bytes in database and collection names2026-09-08ghsa · osvUS
### Impact Passing untrusted input as part of a database or collection name may result in targeting a different database or collection than specified. ### Patches Fixed in PHP library 1.21.4 and 2.4.1. ### Workarounds Validate database and collection names prior to passing into APIs.

sources

Which sources assert this record, and when.

cert_bund nvd osv NVD CVE.org MITRE

published 2026-08-27modified 2026-08-28

references (5) nvd

External citations — patches, advisories, analysis.

scry

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