What is CVE-2026-84968?

CVE-2026-84968 is a medium-severity vulnerability, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-09-03.

How severe is CVE-2026-84968?

Medium severity. CVSS v3 base score is 5.3 out of 10.

CVE-2026-84968

CVE-2026-84968

An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cna@mongodb.com

Frequently asked questions

What is CVE-2026-84968?: CVE-2026-84968 is a medium-severity vulnerability, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-09-03.
How severe is CVE-2026-84968?: Medium severity. CVSS v3 base score is 5.3 out of 10.