CVE-2026-82052CWE-617

CVE-2026-82052

Medium · published September 8, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
41.7
In the wild
Unconfirmed
What it is

The $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the  regex match can start in the middle of a multi-code-unit character, triggering an assertion during query execution.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A
EPSS
0.00497 · 41.7th percentile
Weakness
CWE-617 · Reachable Assertion
Published
2026-09-08T21:18Z
Affected products (3)
ProductVersionsFixed in
mongodb/mongodb≥ 7.0.0, < 7.0.417.0.41
mongodb/mongodb≥ 8.0.0, < 8.0.308.0.30
mongodb/mongodb≥ 8.3.0, < 8.3.98.3.9
References (1)
https://jira.mongodb.org/browse/SERVER-127985 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 16:12Z
    $regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars
    cvelistv5