CVE-2026-17600 Nexus Repository 3 - Session Not Invalidated on User Account Deletion or Deactivation

High 8.7 Published 7 Aug 2026 Updated 7 Aug 2026

Attackers with deleted or deactivated accounts can retain active sessions to read, modify, or delete repository content, requiring immediate patching.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-17600?

CVE-2026-17600 is a high-severity authentication bypass vulnerability in Sonatype Nexus Repository Manager, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Sonatype Nexus Repository 3 did not immediately terminate a user's active login session or revoke their cached permissions when that user's account was deleted, deactivated, or had its password changed. A user whose account was already logged in at the time of one of these actions could continue using their existing session to interact with the repository as though the account were still active, until that session independently expired. Depending on the permissions previously held, this could allow continued unauthorized access to read, modify, or delete repository content after access was intended to be revoked.

Weakness: CWE-613

Which versions are affected by CVE-2026-17600?

It affects 1 product.

Products include Sonatype Nexus Repository Manager.

How do I fix CVE-2026-17600?

Apply the vendor's patch.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-17600 being exploited?

There is no known exploitation of CVE-2026-17600 in the wild and no public exploit code.

All Sonatype Nexus Repository Manager vulnerabilities

Sources

Also known as GHSA-9pmx-p77j-955r, MINI-mwr3-fh86-f2wm, MINI-r3w4-22r5-j7r2.