Server-Side Connection Initiation in Nexus Repository Manager 3.x via LDAP Admin
CVE-2026-3048 Published on May 11, 2026
Nexus Repository 3 - Improper LDAP Referral Handling
An authenticated administrator who configures or tests LDAP connectivity in Sonatype Nexus Repository Manager versions 3.0.0 through 3.91.1 may be able to initiate unintended server-side connections when interacting with a malicious LDAP server.
Weakness Types
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-3048 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-3048 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-3048
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Affected Versions
Sonatype Nexus Repository:- Version 3.0.0 and below 3.92.0 is affected.