CVE-2026-13077
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
- Mongodb Server, Mongo, Mongodb
- Mongodb
- < 7.0.39, 8.0.28, 8.2.12, 8.3.7
- CVSS 4.0
- 7.1 HIGH
- CVSS 3.1
- 7.1 HIGH
- EPSS
- 0.3% (20th percentile)
- Weakness
- CWE-125
- NVD status
- Analyzed
- Published
- 2026-07-22
CVE-2026-13077 at NVD
No indexed exploits for CVE-2026-13077 yet
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No exploit for CVE-2026-13077 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.