Bug 2528149 (CVE-2026-84968)

Summary: CVE-2026-84968 php-pecl-mongodb: MongoDB PHP driver: Information Disclosure due to out-of-bounds read in BSON decoding
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the MongoDB PHP driver. An unauthenticated attacker can exploit an out-of-bounds read vulnerability in the BSON decoding component by supplying specially crafted input. This can cause a small amount of adjacent process memory to be copied into an error message. Consequently, this may lead to the unintended disclosure of limited memory contents.
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Bug Depends On: 2533723, 2533725    
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Description OSIDB Bzimport 2026-09-03 17:21:27 UTC 
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.