CVE-2026-13077
Out-of-Bounds Heap Read in BSON CodeWScope Element Parsing via Malformed BSONColumn Data
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | mongodb |
| Product | mongodb server |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected Versions
MongoDB / MongoDB Server
7.0 < 7.0.39 8.0 < 8.0.28 8.2.0 < 8.2.12 8.3.0 < 8.3.7