CVE-2026-8202 json
Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators
published 2026-05-13 5 mo ago modified 2026-10-26 13 d ago also BIT-mongodb-2026-8202 , EUVD-2026-29894
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
Using a densely populated chars mask and a large input string in the MongoDB aggregation operators $trim, $ltrim, and $rtrim, an authenticated user with aggregation permissions can pin CPU utilization at 100% for an extended period of time.
This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
Patch / fix
- bitnami mongodb 7.0.34, 8.0.23, 8.2.9, 8.3.2
- MongoDB, Inc. MongoDB Server 7.0.34, 8.0.23, 8.2.9, 8.3.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mongodb | >=7.0.0, <7.0.34 >=8.0.0, <8.0.23 >=8.2.0, <8.2.9 >=8.3.0, <8.3.2 |
7.0.34 8.0.23 8.2.9 8.3.2 |
Affected products
- MongoDB, Inc. MongoDB Server
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
- Technology feeds
References
-
jira.mongodb.org
/browse/SERVER-120668
issue-tracking, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-8202
web
Sources
- CVE List CVE-2026-8202
- NVD CVE-2026-8202
- OSV BIT-mongodb-2026-8202
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.