Medium severity · published Apr 8, 2026
CVE-2026-3438
Nexus Repository 3 - Reflected Cross-Site Scripting (XSS) in ?describe Pages
6.1
CVSS
0.4%
EPSS
No
On KEV
Description
A reflected cross-site scripting vulnerability exists in Sonatype Nexus Repository versions 3.0.0 through 3.90.2 that allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser through a specially crafted URL. Exploitation requires user interaction.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NR
Nexus Repository · Sonatype
3.0.0 before 3.91.0 · source: vendor
NR
Nexus Repository Manager · Sonatype
3.0.0 before 3.91.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3438
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3438
Release Notes
https://help.sonatype.com/en/sonatype-nexus-repository-3-91-0-release-notes.html
Vendor Advisory
https://support.sonatype.com/hc/en-us/articles/50609137161363
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