# MongoDB PHP Driver DoS flaw patched

Published: 2026-10-21 · Severity: routine · Sectors: Technology · Not tied to an actor or CVE
Canonical: https://vorant.io/reports/bfdfdd2e-e052-5e08-86a9-4de88758b29b/mongodb-php-driver-dos-flaw-patched
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> CERT-FR warns of a remote denial-of-service vulnerability in MongoDB PHP Driver affecting versions before 1.21.12, 2.1.12 and 2.5.5.

Source: cert.cyber.gouv.fr — https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1347

## What to check

- Applies to: Not tied to a specific actor, malware or CVE, only to the sectors it covers, so it may be general reporting. Check the source before acting on it. Whether it concerns you is not assessed.

CERT-FR published an advisory describing a vulnerability in the MongoDB PHP Driver that allows a remote attacker to cause a denial of service. The affected versions are PHP Driver 1.x.x prior to 1.21.12, 2.1.x prior to 2.1.12, and 2.5.x prior to 2.5.5. No CVE identifier is referenced in the bulletin; instead the issue is tracked under MongoDB's internal ticket PHPC-276, published 19 October 2026.

There is no indication of active exploitation in the wild. Defenders running applications that use the MongoDB PHP Driver should consult the vendor's security bulletin and upgrade to the fixed versions (1.21.12, 2.1.12, or 2.5.5 or later) to mitigate the denial-of-service risk.

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1347

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