7.5

CVE-2026-4358: mongodb inc mongodb server Double Free

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-4358
Published 17-03-2026Last modified 17-03-2026
Open JSON

Vulnerability summary

CVE-2026-4358 is a high (CVSS 7.5) Double Free vulnerability in mongodb inc mongodb server. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.38%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 17-03-2026
    PublishedVulnerability first disclosed.
  2. 17-03-2026
    Last modifiedVulnerability information updated.

Description

A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution (SBE) engine when an in-memory hash table is spilled to disk.

CVSS metrics

6 scores · 3 sources · 2 versions

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

+0.04 pp

From 0.34% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (jira.mongodb.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Mongodb1 product
  • mongodb≥ 7.0.0, < 7.0.31 | ≥ 8.0.0, < 8.0.20 | ≥ 8.2.0, < 8.2.6
Mongodb inc1 product
  • mongodb server≥ 8.2, < 8.2.6 | ≥ 8.0, < 8.0.20 | ≥ 7.0, < 7.0.31
Ubuntu1 product
  • mongodbAll versions (No fix recorded)

3 vendors · 3 products

References

3 links