CVE-2026-42018 · High · CISA KEV

JFrog Artifactory Improper Auth: Internal Tokens Exposed, Sensitive Resources at Risk

Threat Engine Auto-Feed · data current as of 2026-09-12

CVE-2026-42018 in JFrog Artifactory allows unauthenticated callers to receive an internal anonymous-user token, even when anonymous access is disabled. This improper authentication vulnerability is actively exploited in the wild, as indicated by its inclusion in CISA KEV. Successful exploitation could expose sensitive resources.

  • CVSS:
  • EPSS percentile: 0.58304
  • Exploitation pressure: 60/100 (High)

Exploitation reality: listed in CISA KEV (exploited in the wild) · EPSS 58th percentile. Threat × Vulnerability from public signals — impact depends on your environment.

Weakness —

Improper authentication occurs when a system fails to correctly verify the identity of a user or process, or when it grants access without proper validation. In this case, Artifactory incorrectly provides an internal anonymous-user token to unauthenticated requests, bypassing intended access controls.

Who's at risk

Exposure: unknown · Auth: unknown · unknown

Enterprise profiles most at risk

  • Organizations using JFrog Artifactory for artifact management, especially those handling sensitive intellectual property or critical build components.
  • Financial services and Technology sectors, given the documented interest from financially motivated and state-sponsored threat actors.

Misconfigurations that escalate it

  • Reliance solely on disabling anonymous access without additional layered security controls.
  • Insufficient monitoring for unusual token issuance or access patterns.

High-impact scenarios

  • Unauthorized access to internal repositories and sensitive build artifacts.
  • Data exfiltration of proprietary code, configurations, or intellectual property.
  • Potential for supply chain compromise if malicious artifacts are injected or legitimate ones are tampered with.

Likely adversaries

  • FIN7 — Financial services (Assessed)
  • LockBit affiliates — Financial services (Assessed)
  • APT38 (Lazarus) — Financial services (Assessed)
  • APT29 (Cozy Bear) — Technology (Assessed)
  • Scattered Spider — Technology (Assessed)

What to do (defensive)

Detect

  • Monitor JFrog Artifactory logs for unexpected issuance of anonymous-user tokens.
  • Look for unauthenticated requests successfully accessing internal resources.
  • Implement network segmentation to restrict direct internet exposure of Artifactory instances.

Contain

  • Immediately review and revoke any suspicious anonymous-user tokens.
  • Isolate affected Artifactory instances from critical internal networks.
  • Audit all access logs for signs of unauthorized resource access.

Patch

  • Apply the latest security patches and updates for JFrog Artifactory as soon as they become available from the vendor.

Frontier verdict — High

High priority due to active exploitation (CISA KEV) and potential for sensitive resource exposure via improper authentication in JFrog Artifactory.

For detection-engineering and awareness only · point-in-time · not security advice · sourced from NVD, FIRST EPSS, CISA KEV. Adversary mappings are assessments unless cited.