7.1

CVE-2026-9100: mongodb inc. c driver

CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-9100DEBIAN-CVE-2026-9100
Published 20-05-2026Last modified 20-05-2026
Open JSON

Vulnerability summary

CVE-2026-9100 is a high (CVSS 7.1) vulnerability in mongodb inc. c driver. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.4% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.30%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-05-2026
    PublishedVulnerability first disclosed.
  2. 20-05-2026
    Last modifiedVulnerability information updated.

Description

The MongoDB C Driver's legacy GridFS API accepts malformed file metadata from the database without adequate validation. Crafted documents in a GridFS collection may cause any application that reads those files via the legacy API to either crash (via a division-by-zero) or silently leak process memory contents (via an out-of-bounds read).

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

+0.01 pp

From 0.29% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.30%

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

Debian1 product
  • mongo-c-driver< 1.23.1-1+deb12u3 | < 1.30.4-1+deb13u2 | < 2.2.4-1
Mongodb1 product
  • c_driver≥ 1.10.0, < 1.30.8 | ≥ 2.0.0, < 2.2.4
Mongodb inc.1 product
  • c driver≥ 1.0, < 1.30.8 | ≥ 2.0, < 2.2.4
Ubuntu1 product
  • mongo-c-driverAll versions (No fix recorded)

4 vendors · 4 products

References

4 links