This report was translated by AI; nobody has reviewed the translation yet. Original language: Czech.

[TLP:CLEAR] Sonatype Nexus Repository fixes 2 vulnerabilities

Sonatype fixes two vulnerabilities in Nexus Repository 3 with version 3.88.0 [1][2].

Sonatype Nexus Repository - SSRF (CVE-2026-0600)
CVSS 6.2 (Medium)

An authenticated remote attacker with administrator privileges can perform an SSRF attack through a maliciously configured remote storage URL of a proxy repository and force the server to send requests to unintended network destinations (internal networks/cloud metadata) [1].

The vulnerability is present in product:

  • Sonatype Nexus Repository; >=3.0.0, <3.88.0

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N

More information:

The vulnerability was publicly disclosed 13. 1. 2026.

Sonatype Nexus Repository - reflected XSS (CVE-2026-0601)
CVSS 5.1 (Medium)

An unauthenticated remote attacker can execute arbitrary JavaScript in the victim's browser through a reflected XSS vulnerability and subsequently perform actions on behalf of the victim, including privilege escalation and unauthorized configuration changes [2].

The vulnerability is present in product:

  • Sonatype Nexus Repository; >=3.82.0, <=3.87.1

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

More information:

  • CVE-2026-0601 at cve.org, NVD
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') at cwe.mitre.org

The vulnerability was publicly disclosed 13. 1. 2026.

By CESNET, z.s.p.o. Michaela Jarošová on 22. 1. 2026.

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