CVE-2026-13063

libmongocrypt Improper Input Validation Leading to Process Termination

CVE-2026-13063 is fixed in MongoDB on 1 platform by MongoDB 8.3.7 (version 8.3.7), released June 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.3

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0040

34th percentile

An authenticated user with standard read/write privileges can cause the mongod process to terminate due to an out-of-memory condition by sending a crafted aggregation command. MongoDB's libmongocrypt library insufficiently validates payload-supplied values, which can result in an excessively large memory allocation.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
MongoDB	8.3.7	MongoDB 8.3.7	Jun 11, 2026

Details

Published
July 22, 2026
Weakness
CWE-190: Integer Overflow or Wraparound
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-13063

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