What is CVE-2026-3199?

CVE-2026-3199 is a high-severity vulnerability in Sonatype Nexus Repository, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-04-08.

How severe is CVE-2026-3199?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Sonatype Nexus Repository

CVE-2026-3199

A vulnerability in the task management component of Sonatype Nexus Repository versions 3.22.1 through 3.90.2 allows an authenticated attacker with task creation permissions to execute arbitrary code, bypassing the nexus.scripts.allowCreation security control.

Vulnerability class: Insecure Deserialization

Published 2026-04-08 · last modified 2026-09-18.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.4th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.006 · change: -0.002

Affected products

Sonatype Nexus Repository — versions 3.22.1
Sonatype Nexus Repository Manager

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

103e4ec9-0a87-450b-af77-479448ddef11 (Release Notes, patch)
103e4ec9-0a87-450b-af77-479448ddef11 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-3199?: CVE-2026-3199 is a high-severity vulnerability in Sonatype Nexus Repository, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-04-08.
How severe is CVE-2026-3199?: High severity. CVSS v3 base score is 8.8 out of 10.