Cross-document data leak via malformed BSON array parsing in reused thread buffer
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 3.13.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The MongoDB C# Driver's BSON deserialization component is affected, so applications using it to parse serialized input can leak small amounts of data from other requests handled on the same thread. An unauthenticated attacker who can submit crafted serialized data could thereby obtain fragments of another user's or request's information.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A memory-handling weakness in the BSON deserialization component of the MongoDB C# Driver may cause data left over from previously processed content to be returned when specially crafted serialized input is parsed. An unauthenticated party able to supply serialized data to an application that maps certain primitive collection types can cause residual bytes from unrelated data processed earlier on the same execution thread to be surfaced as legitimate values. This can result in disclosure of a limited amount of information belonging to other requests or principals of the consuming application. No authentication or special privileges within the application are required.
Timeline
- CVE published
- First seen by cve.now
- Record last updated
Affected versions
- MongoDB C# Driver
From 2.26.0 · fixed in 3.13.0