CVE-2026-42018

Published Aug 12, 2026

Last updated 8 hours ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-42018 is an improper authentication vulnerability affecting JFrog Artifactory. This flaw allows an unauthenticated caller to obtain an internal anonymous-user token, even when anonymous access is explicitly disabled within the system. The presence of this token could potentially lead to the exposure of sensitive resources within the Artifactory instance. This vulnerability has been observed in active exploitation, often chained with CVE-2026-42016. When combined, these vulnerabilities can enable attackers to escalate privileges and gain administrative control over self-hosted Artifactory servers.

Description: JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
Source: reefs@jfrog.com
NVD status: Analyzed
Products: artifactory

Risk scores

CVSS 3.1

Type: Secondary
Base score: 7.5
Impact score: 3.6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: HIGH

Known exploits

Data from CISA

Vulnerability name: JFrog Artifactory Improper Authentication Vulnerability
Exploit added on: Sep 11, 2026
Exploit action due: Sep 25, 2026
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.

Weaknesses

reefs@jfrog.com: CWE-287

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 10

Configurations

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References

Sources include official advisories and independent security research.