Vulnerability details
CVE-2026-82052
MongoDB Server
$regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars
CVSS 4.0
7.1High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 4.0 | CVEProject cvelistV5 (CNA) (mongodb) | 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 |
| 6.5Medium | 3.1 | CVEProject cvelistV5 (CNA) (mongodb) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| MongoDB | MongoDB Server | 7.0 ≤ v < 7.0.41 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 8.0 ≤ v < 8.0.30 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 8.3.0 ≤ v < 8.3.9 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-09-08
- Last updated
- 2026-09-10
- State
- Published
- Assigner (CNA)
- mongodb
Exploit prediction (EPSS)
0.49%
Probability of exploitation in 30 days
42.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-617Reachable assertion