CVE-2026-7308 Sonatype CVE debrief

Who should care

Defenders who manage Sonatype Nexus Repository instances, particularly those with versions between 3.6.0 and 3.92.0, should assess exposure and prioritize verification and remediation.

Why it matters

Defenders should care about CVE-2026-7308 because it allows an authenticated user to store content that causes arbitrary JavaScript to execute in user browsers, potentially leading to unauthorized actions in the context of the victim's session. This vulnerability affects Sonatype Nexus Repository versions between 3.6.0 and 3.92.0, and defenders should prioritize verification and remediation to prevent potential exploitation.

• Potential for unauthorized JavaScript execution in user browsers
• Possible actions in the context of the victim's session
• Need for verification of affected versions and remediation

Technical summary

The vulnerability allows an authenticated user with upload permission to store content that causes arbitrary JavaScript to execute in the browser of any user who browses that repository directory via the HTML index page in Sonatype Nexus Repository versions 3.6.0 through versions before 3.92.0. This could allow the attacker to perform actions in the context of the victim's session, potentially leading to unauthorized actions. The vulnerability affects Sonatype Nexus Repository versions between 3.6.0 and 3.92.0. Defenders should prioritize verifying and upgrading to version 3.92.0 or later.

Defensive priority

Defenders should prioritize verifying and upgrading to version 3.92.0 or later, and restrict upload permissions to trusted users.

Recommended defensive actions

• Verify and upgrade to version 3.92.0 or later
• Restrict upload permissions to trusted users
• Monitor for suspicious activity
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Confirm whether affected product deployments exist in managed environments

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability affects Sonatype Nexus Repository versions between 3.6.0 and 3.92.0. Defenders should verify and upgrade to version 3.92.0 or later. The CVE Program and NVD provide official records and assessments of the vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.