CVE-2026-13077 — Out-of-Bounds Heap Read in BSON CodeWScope Element Parsing via Malformed BSONColumn Data
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 ca…
Published: 2026-07-22 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7