6.9

CVE-2026-84968: mongodb php_driver Out-of-bounds Read

CVSS: 6.9v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2026-84968DEBIAN-CVE-2026-84968
Published 03-09-2026Last modified 04-09-2026
Open JSON

Vulnerability summary

CVE-2026-84968 is a medium (CVSS 6.9) Out-of-bounds Read vulnerability in mongodb php_driver. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 8.9% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-09-2026
    PublishedVulnerability first disclosed.
  2. 04-09-2026
    Last modifiedVulnerability information updated.

Description

An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.20%

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
  • php-mongodbAll versions (No fix recorded) | < 2.0.0-1+deb13u1 | < 2.5.3-1
Mongodb1 product
  • php_driver≥ 1.15.0, < 1.21.8 | ≥ 2.2.0, < 2.5.1 | ≥ 1.15.0, < 1.21.9 | ≥ 2.0.0, < 2.1.9 | ≥ 2.2.0, < 2.5.2
Ubuntu1 product
  • php-mongodbAll versions (No fix recorded)

3 vendors · 3 products

References

4 links