CVE-2026-88035CWE-190

CVE-2026-88035

Medium · published September 10, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
0.9
In the wild
Unconfirmed
What it is

A size check in the client-side authentication path of the MongoDB C Driver can wrap around, so an unusually large user-name value is accepted and copied past the end of a small buffer. A party able to set the driver's connection settings may cause the application that embeds the driver to terminate unexpectedly. Reaching this code requires a build in which the optional external SASL authentication backend is present and a connection configured to use it.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
5.7 · CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00103 · 0.9th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-09-10T23:17Z
Affected products (2)
ProductVersionsFixed in
mongodb/c_driver≥ 1.10.0, < 1.30.101.30.10
mongodb/c_driver≥ 2.2.0, < 2.5.32.5.3
References (1)
https://jira.mongodb.org/browse/CDRIVER-6416 · [email protected]
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 18:07Z
    Heap buffer overflow via wrapped size check during SASL username canonicalization in MongoDB C Driver
    cvelistv5