CVE-2026-97666
Nexus Repository 3 - Unsafe Reflection in ExtDirect Repository Endpoint
Sonatype Nexus Repository 3Applications & CMS
CVSS
6.9MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.55%Chance of exploitation activity in the next 30 days, higher than 45% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 3.97.0Nexus Repository 3CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
Sonatype Nexus Repository 3 allows an unauthenticated remote attacker to supply attacker-controlled input to a Java class loading call through an ExtDirect endpoint. This allows the attacker to learn whether specific classes are present in the application. The issue does not by itself allow code execution.
Text from CVE List
Affected versions 1
- Nexus Repository 3affected: 3.0.0 before 3.97.0CVE List