CVE-2026-42018: JFrog Artifactory Improper Authentication Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-42018
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-42018Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 58% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-42018 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedJFrog security advisory (AV26-867) – Update 2cccs
- highexploitedCISA Adds Three Known Exploited Vulnerabilities to Catalogcisa
- highexploited[UPDATE] [hoch] JFrog Artifactory: Mehrere Schwachstellencert-bund
- highCVE-2026-42018: JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller w…nvd
Recent advisories for JFrog Artifactory Improper
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploitedCVE-2026-82329: JFrog Artifactory Improper Authentication Vulnerabilitycisa-kev · 2026-09-02
- criticalexploitedCVE-2026-66384: JFrog Artifactory Improper Limitation of a Pathname to a Restricted Directory Vulnerabilitycisa-kev · 2026-08-27
- mediumCVE-2026-65618: Improper URL validation when handling specific URLs, allows an attacker, under certain conditi…nvd · 2026-07-27
More from CISA Known Exploited Vulnerabilities
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- criticalCVE-2026-42016: JFrog Artifactory Incorrect Authorization Vulnerability2026-09-11
- criticalCVE-2026-84869: ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerabilit…2026-09-11
- criticalCVE-2026-67277: MikroTik RouterOS Missing Authentication for Critical Function Vulnerability2026-09-10
- criticalCVE-2026-86060: MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability2026-09-10