7.1

CVE-2026-82058: mongodb Uncaught Exception

CVSS: 7.1v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-82058
Published 08-09-2026Last modified 08-09-2026
Open JSON

Vulnerability summary

CVE-2026-82058 is a high (CVSS 7.1) Uncaught Exception vulnerability in mongodb. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.2% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v4.0 (CVE.org)
EPSS score
0.40%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-09-2026
    PublishedVulnerability first disclosed.
  2. 08-09-2026
    Last modifiedVulnerability information updated.

Description

A flaw in MongoDB's JSON Schema validation error generation code allows an authenticated user with readWrite privileges to crash the mongod server. When a BSON document containing an array with a malformed numeric field name fails a $jsonSchema items type constraint, the error generation path performs unsafe numeric conversion on the user-controlled field name without proper exception handling, resulting in an uncaught exception that terminates the server process. This is possible because incoming wire protocol BSON validation does not enforce that array element field names are valid, in-range numeric indices.

CVSS metrics

6 scores · 3 sources · 2 versions

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.12 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.40%

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

Mongodb2 products
  • mongodb≥ 7.0.0, < 7.0.41 | ≥ 8.0.0, < 8.0.30 | ≥ 8.3.0, < 8.3.9
  • mongodb server≥ 8.3.0, < 8.3.9 | ≥ 8.0.0, < 8.0.30 | ≥ 7.0.0, < 7.0.41
Ubuntu1 product
  • mongodbAll versions (No fix recorded)

2 vendors · 3 products

References

3 links