CVE-2026-42018
Published 2026-08-12 · Updated 2026-10-23 · Source reefs@jfrog.com
Summary
CVE-2026-42018 is a high-severity (CVSS 7.5) vulnerability in JFrog Artifactory. CISA added it to the Known Exploited Vulnerabilities catalog on September 11, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 25, 2026. CISA does not currently list it as used in ransomware campaigns. JFrog has 4 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 4 known-exploited JFrog vulnerabilities →Description
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA Known-Exploited Vulnerability
Product: JFrog — Artifactory
Name: JFrog Artifactory Improper Authentication Vulnerability
Date added: 2026-09-11 · Due: 2026-09-25
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
References
- https://docs.jfrog.com/releases/docs/artifactory-self-managed-releases
- https://docs.jfrog.com/releases/docs/jfrog-security-advisories
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42018
- https://www.wiz.io/blog/artifactory-under-attack-in-the-wild-exploitation-of-cve-2026-42016-cve-2026-4201