CVE-2026-13077
High
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.
SeverityHigh
CVSS7.1
Exploit probability36. percentile0.4%
Product
Mongodb
PublishedJul 22, 2026
First seenJul 22, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- mongodb mongodb7.0.39, 8.0.28, 8.2.12, 8.3.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb mongodb | 7.0.0 ≤ v < 7.0.39, 8.0.0 ≤ v < 8.0.28, 8.2.0 ≤ v < 8.2.12, 8.3.0 ≤ v < 8.3.7 | 7.0.39, 8.0.28, 8.2.12, 8.3.7 |
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