8.8

CVE-2026-8201: mongodb inc mongodb server Use After Free

CVSS: 8.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-8201
Published 13-05-2026Last modified 13-05-2026
Open JSON

Vulnerability summary

CVE-2026-8201 is a high (CVSS 8.8) Use After Free vulnerability in mongodb inc mongodb server. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-05-2026
    PublishedVulnerability first disclosed.
  2. 13-05-2026
    Last modifiedVulnerability information updated.

Description

A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client's FLE-related query. This issue impacts MongoDB Server’s mongocryptd component 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.

CVSS metrics

6 scores · 3 sources · 2 versions

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.09 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mongodb1 product
  • 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
Mongodb inc1 product
  • mongodb server≥ 7.0, < 7.0.34 | ≥ 8.0, < 8.0.23 | ≥ 8.2, < 8.2.9 | ≥ 8.3, < 8.3.2
Ubuntu1 product
  • mongodbAll versions (No fix recorded)

3 vendors · 3 products

References

3 links