CVE-2026-17593

HIGH

Nexus Repository - Arbitrary Class Instantiation via Unsafe Realm Configuration

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-17593 has a selected CVSS score of 7.2 (high).

Description

An account holding the nexus:settings:update permission in Nexus Repository 3 (or the equivalent nexus:settings permission in the legacy Nexus Repository 2) could submit arbitrary values as realm identifiers through an internal configuration API that did not validate them against the set of registered realms. Because unrecognized entries were persisted and re-evaluated on every realm load via a legacy code path, this could result in unintended code executing inside the Nexus Repository process, and in some cases a persistent authentication lockout that was not visible through the administrative UI.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactTotal

CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 7, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

Nexus Repository

Browse Sonatype / Nexus Repository

Default status: unaffected

CVE List2.8.0 to < 3.95.0affected

References

3