ZeroDayAlert

CVE-2026-42016: JFrog Artifactory Incorrect Authorization Vulnerability

JFrog Artifactory contains an incorrect authorization vulnerability that allows leads to privilege escalation attack due to a validation check of the token signature/issuer and not the token’s scope.

JFrog Artifactory Added to KEV 2026-09-11 Federal due 2026-09-25 Known ransomware use

Required action — quoted from CISA

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.

Where this comes from. The identifier, product, dates and required action above are copied verbatim from the CISA Known Exploited Vulnerabilities catalog. The action plan below is written by an AI agent from that record and published automatically. AssurePort has not independently tested this vulnerability and makes no claim about whether any specific system is affected.

Who is affected

JFrog Artifactory deployments are vulnerable to privilege escalation through incorrect authorization logic. The vulnerability stems from a token validation check that verifies the token's signature and issuer but does not properly validate the token's scope, allowing an attacker with a valid token to assume higher privileges than intended. The record does not specify which versions of Artifactory are affected.

How to check whether this touches you

  • Inventory: Confirm whether you operate JFrog Artifactory and identify all instances—on-premises, cloud-hosted, or hybrid.
  • Reachability: Determine whether each instance is reachable from the Internet or from networks where untrusted users can obtain or forge authentication tokens.
  • Token usage: Audit whether your deployment relies on token-based authentication and whether token scope validation is enforced at the application layer.
  • Version fingerprinting: Connect to each instance and record the running Artifactory version; check JFrog's advisory for affected version ranges, bearing in mind that some patches may be backported to older releases.

What to do

  1. Do not wait for patch availability before reducing risk: restrict network access to Artifactory to authorised users and systems only, using firewall rules or network segmentation.
  2. Review and rotate all authentication tokens in use; revoke tokens that are no longer needed and reduce token lifetime where possible.
  3. Enable audit logging for all token-based authentication attempts and privilege changes; ensure logs are retained for at least 90 days and shipped to a central store separate from the Artifactory instance.
  4. Contact JFrog support for confirmed patch availability and timeline; apply patches to all instances according to CISA BOD 26-04 guidance (federal systems by 25 September 2026; others according to your risk assessment and patch cycle).
  5. If mitigations cannot be deployed and patches are unavailable, evaluate whether discontinuation of the product is necessary to meet your security posture requirements.

If you find you were exposed

Exploitation of privilege escalation typically occurs well before public disclosure, so you should search authentication and audit logs for unusual token-based access, privilege grants, or artefact modifications dating back at least six months. Examine logs for tokens that accessed resources or permissions beyond their documented scope, and cross-reference with known user and system identities to identify anomalous activity. Log retention is the primary constraint; if your logs have already rotated, document the gap and focus on forward monitoring once patches are applied.

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