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PatchSiren cyber security CVE debrief

CVE-2026-14504 Sonatype CVE debrief

CVE-2026-14504 is an authorization bypass vulnerability in Nexus Repository 3's component upload API, allowing users with read/browse privileges on Swift, Terraform, or Conda hosted repositories to upload arbitrary artifacts, bypassing write-permission checks. Defenders should assess exposure and apply patches or mitigations to prevent unauthorized artifact uploads. This vulnerability has a CVSS score of 8.2, indicating high severity. The CVE record and NVD entry provide details on the vulnerability, including affected versions of Nexus Repository Manager.

Vendor
Sonatype
Product
Nexus Repository 3
CVSS
HIGH 8.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-09-22
Advisory published
2026-07-14
Advisory updated
2026-09-22

Who should care

Defenders responsible for Nexus Repository Manager deployments should assess exposure and apply patches or mitigations to prevent unauthorized artifact uploads.

Why it matters

CVE-2026-14504 is a high-severity authorization bypass vulnerability in Nexus Repository 3's component upload API. Defenders should prioritize verifying exposure and applying patches or mitigations to prevent unauthorized artifact uploads.

  • Verify exposure and apply patches or mitigations to prevent unauthorized artifact uploads.
  • Monitor for suspicious activity and implement compensating controls if necessary.
  • Implement additional security controls to prevent exploitation.

Technical summary

The vulnerability allows users with read/browse privileges on Swift, Terraform, or Conda hosted repositories in Nexus Repository 3 to upload arbitrary artifacts, bypassing intended write-permission checks. This could lead to unauthorized modifications and potential security risks. Defenders should prioritize verifying exposure and applying patches or mitigations to prevent unauthorized artifact uploads.

Defensive priority

Defenders should prioritize verifying exposure and applying patches or mitigations to prevent unauthorized artifact uploads.

Recommended defensive actions

  • Verify exposure by checking Nexus Repository Manager versions and configurations.
  • Apply patches or mitigations to prevent unauthorized artifact uploads.
  • Monitor for suspicious activity and implement compensating controls if necessary.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 8.2 and affected versions of Nexus Repository Manager. Evidence is limited to public sources, and defenders should verify exposure using official advisories and vendor guidance. The vulnerability affects Nexus Repository 3's component upload API, specifically for Swift, Terraform, or Conda hosted repositories. There may be additional information in vendor documentation and security advisories

Sources and references

Verified primary and authoritative sources

  • CVE-2026-14504 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-14504

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-14504 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-14504

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://help.sonatype.com/en/sonatype-nexus-repository-3-94-0-release-notes.html

    103e4ec9-0a87-450b-af77-479448ddef11 - Release Notes

  • Source reference

    Unverified legacy reference

    URL: https://support.sonatype.com/hc/en-us/articles/53137654741907

    103e4ec9-0a87-450b-af77-479448ddef11 - Vendor Advisory

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.