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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-13077

Out-of-Bounds Heap Read in BSON CodeWScope Element Parsing via Malformed BSONColumn Data

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Status
Published
Published
Updated
Assigning organization
mongodb

Description

A missing bounds check in the BSON CodeWScope element accessors allows an attacker to trigger an out-of-bounds heap read via a crafted aggregation pipeline. The vulnerability can be exploited by an authenticated user by generating a malformed BSONColumn data containing a CodeWScope element, bypassing wire-level BSON validation. When the forged element is decompressed, the unchecked size value is used in pointer arithmetic, causing either a server crash or disclosure of adjacent heap memory contents.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

MongoDB MongoDB Server

Default version status: unaffected

  • 7.0 to < 7.0.39affected
  • 8.0 to < 8.0.28affected
  • 8.2.0 to < 8.2.12affected
  • 8.3.0 to < 8.3.7affected

References