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.
Overview
JFrog Artifactory Self-Hosted versions before 7.133.11 contain an authorization flaw in its token validation logic. When a user presents an access token, Artifactory verifies the signature and issuer but does not enforce the token's declared scope. A low-privileged or anonymous-user token can therefore be submitted to the token-exchange endpoint to obtain an admin-scoped token, giving an attacker full administrative control over the instance, its artifacts, credentials, and integrations.
Vulnerability details
CWE-863 (Incorrect Authorization) describes a system that performs an authorization check but applies the wrong criteria. In Artifactory's case, the token validation path confirms that a presented JWT carries a valid signature from a recognized issuer, which establishes authenticity, but it never verifies whether the token's scope permits the requested privilege elevation. Because the scope field is ignored during the exchange, any legitimately signed token, regardless of the permissions it was issued with, satisfies the authorization gate for obtaining a higher-privileged token.
An attacker who holds any valid low-privileged Artifactory token submits a POST request to the access API token endpoint requesting an elevated scope. The server returns an admin-scoped token without checking whether the presented token's scope authorizes that elevation. Wiz Research observed this exploited in the wild by first obtaining an anonymous-user token via a separate flaw, then immediately exchanging it for an admin-scoped token through this endpoint. The resulting token retains the anonymous username but carries full administrative authority, allowing the attacker to create persistent admin accounts, deploy malicious Groovy plugins, and execute arbitrary code on the server.
Severity and impact
Exploitation status
This vulnerability is confirmed as actively exploited in the wild — it is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog.
Detection and monitoring
- Review Artifactory access logs for POST requests to
/access/api/v1/tokensthat return HTTP 200 and are immediately followed by administrative actions (account creation at/api/security/users/or/access/api/ui/users/) attributed totoken:anonymous, which indicates a scope-escalated anonymous token in use. - Audit Artifactory audit logs for new administrator account creation or Groovy plugin installation events where the acting identity is
token:anonymousor where no corresponding authenticated login session precedes the action, as legitimate admin operations originate from named, authenticated users.
Remediation
Additional hardening
- Upgrade Artifactory Self-Hosted to version 7.133.11 or later, which corrects the token scope validation logic. Consult the vendor advisory listed in References for the full set of fixed builds across active release lines.
- Restrict network access to the Artifactory access API (port 8081/8082 and the
/access/path prefix) to trusted internal networks and authenticated management hosts only, reducing the attack surface for token-exchange abuse. - Audit all Artifactory administrator accounts and revoke any that were created unexpectedly; review installed Groovy plugins for unauthorized additions, as post-exploitation activity in observed attacks included persistent admin account creation and malicious plugin deployment.
- If anonymous access is not required, disable it in Artifactory's security settings to remove the lowest-friction path to obtaining a valid token for use in this escalation chain.
Key dates
References
- https://docs.jfrog.com/releases/docs/artifactory-self-managed-releases
- https://docs.jfrog.com/releases/docs/jfrog-security-advisories
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-42016
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42016
- https://www.wiz.io/blog/artifactory-under-attack-in-the-wild-exploitation-of-cve-2026-42016-cve-2026-4201
Frequently asked questions
Does CVE-2026-42016 affect my FedRAMP authorization?
If JFrog Artifactory runs inside your authorization boundary, CVE-2026-42016 is a direct concern for your Federal Risk and Authorization Management Program (FedRAMP) authorization. CISA has listed this vulnerability in its Known Exploited Vulnerabilities (KEV) catalog with a remediation deadline of September 25, 2026. An unpatched KEV inside your boundary is an assessor finding. You must either remediate it or formally document a mitigation before your assessor and sponsoring agency raise it.
How does Knox help me handle CVE-2026-42016?
Knox does not patch JFrog Artifactory on your behalf. Remediating this vulnerability is your responsibility under the FedRAMP shared-responsibility model. What Knox provides is the pre-authorized, single-tenant boundary to carry out that remediation in, along with continuous compliance monitoring and audit-artifact coverage to document the fix for your next assessment. The patch is yours to apply; maintaining a defensible compliance posture while you apply it is not something you have to manage alone.
How does Knox's monitoring help with vulnerabilities like this?
Knox's automated continuous monitoring platform watches your environment for newly disclosed vulnerabilities and compliance issues on an ongoing basis. For a KEV like CVE-2026-42016, that means exposure surfaces during continuous monitoring rather than only when an assessor flags it at review time, giving you more time to act before it becomes a formal finding.
How do I get FedRAMP authorized with Knox?
Knox runs a FedRAMP-as-a-Service platform. It gives SaaS vendors a pre-authorized cloud boundary on AWS, Azure, and GCP. Your application inherits 60-80% of the required security controls. You reach FedRAMP authorization in about 90 days for roughly 90% less than the traditional $3.5M path. Book a meeting and Knox will map your path to authorization.
What happens if CVE-2026-42016 isn't remediated by September 25, 2026?
An unremediated CVE-2026-42016 becomes a Plan of Action and Milestones (POA&M) item. A growing POA&M list is what turns a routine continuous-monitoring review into a difficult conversation with your sponsoring agency. Closing it out and documenting the remediation keeps your authorization clean and preserves the agency relationship that your federal contracts depend on.
Ready to achieve FedRAMP authorization in 90 days or less?
Schedule a meeting to discuss scope, parse readiness, and map your company’s accelerated path to FedRAMP authorization.
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