CVE-2026-84968

Heap out-of-bounds read via corrupt nested BSON in field path error message

Published Sep 3, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6539-1 php-mongodb security update
References
History
Type Values Removed Values Added
CPEs cpe:2.3:a:mongodb:php_driver:*:*:*:*:*:mongodb:*:*
Type Values Removed Values Added
First Time appeared Mongodb
Mongodb php Driver
Vendors & Products Mongodb
Mongodb php Driver
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Heap out-of-bounds read via corrupt nested BSON in field path error message
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mongodb
Published
Updated
Sep 4, 2026, 3:29 PM
Reserved
Sep 2, 2026, 5:58 PM
Status
Analyzed
Published
Sep 3, 2026, 6:17 PM
Modified
Sep 10, 2026, 8:39 PM