SB2026051615 - Authenticated buffer overflow in MongoDB Server

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-8053)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to an out-of-bounds write in the time-series bucket catalog when inserting data with duplicate field names into time-series collections. A remote user can insert specially crafted data to execute arbitrary code.

The issue results from an inconsistency in the internal field-name-to-index mapping.

Remediation

Install update from vendor's website.

References

• https://jira.mongodb.org/browse/SERVER-126021
• https://github.com/mongodb/mongo/commit/e55c99fa494dec4e5b859f7f782071e098a9460c