CVE-2026-42018: JFrog Artifactory Improper Authentication Vulnerability
What it is
JFrog Artifactory contains an improper authentication vulnerability that could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
What to do
Schedule the vendor fix into this week’s change window, prioritising internet-facing and business-critical systems. Confirm the fix is applied everywhere, not just where it was easy.
- Priority
- This week: Schedule into this week’s change window.
- Severity (CVSS)
- 7.5 high
- CISA assessment (SSVC)
- actively exploited; attackers can automate it at scale; partial control or data exposure
- Exploit probability (EPSS, 30 days)
- 9.8%, higher than 95% of all CVEs
- Added to CISA KEV
- 11 September 2026
- CISA fix-by date
- 25 September 2026 (US federal agencies; a sensible deadline for everyone)
- Ransomware use
- Not known
- Weakness
- CWE-287
References
- NIST NVD entry
- CISA KEV entry
- docs.jfrog.com/releases/docs/artifactory-self-managed-releases
- docs.jfrog.com/releases/docs/jfrog-security-advisories
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42018
- www.wiz.io/blog/artifactory-under-attack-in-the-wild-exploitation-of-cve-2026-42
Sources: CISA Known Exploited Vulnerabilities · FIRST Exploit Prediction Scoring System (EPSS) · NIST National Vulnerability Database · CISA Vulnrichment (SSVC), via the CVE Program. This product uses data from the NVD API but is not endorsed or certified by the NVD. Summaries are machine-written from CISA’s description; treat the vendor’s advisory as the authority for fixes.