CVE-2026-42017: JFrog Artifactory Info Disclosure Flaw

CVE-2026-42017 Overview

CVE-2026-42017 is an event-handling weakness in JFrog Artifactory that can expose privileged authorization material to a lower-privileged user under specific conditions. The flaw is categorized under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor). An authenticated attacker with low privileges can obtain authorization tokens or credentials belonging to higher-privileged principals. Successful exploitation enables privilege escalation within Artifactory and lateral movement across repositories, build pipelines, and integrated CI/CD systems that trust Artifactory credentials.

Critical Impact
A low-privileged authenticated user can obtain privileged authorization material, resulting in high confidentiality, integrity, and availability impact across the Artifactory instance.

Affected Products

JFrog Artifactory (self-managed)
JFrog Artifactory versions prior to the vendor-patched release
Deployments referenced in the JFrog Security Advisories

Discovery Timeline

2026-07-27 - CVE-2026-42017 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-42017

Vulnerability Analysis

The vulnerability resides in Artifactory's event-handling logic. Internal events that carry authorization material, such as tokens or credential references, are dispatched or logged in a way that a lower-privileged authenticated user can observe. The condition requires an active authenticated session but no user interaction from the victim. Because Artifactory acts as a central artifact repository and identity broker for CI/CD systems, exposed authorization material often maps to administrative or service-account privileges. An attacker can replay the recovered tokens against Artifactory's REST API or downstream systems that honor them.

Root Cause

The root cause is improper access control over event data ([CWE-200]). Artifactory generates internal events during operations such as authentication, replication, or webhook dispatch. Under specific conditions, those events include privileged authorization material and become reachable through interfaces or logs accessible to lower-privileged accounts. The event handler fails to redact or restrict sensitive fields before making the event visible.

Attack Vector

Exploitation occurs over the network against an authenticated session. The attacker authenticates as a low-privileged Artifactory user, then triggers or observes event flows that surface authorization material tied to higher-privileged principals. Once the material is captured, the attacker reuses it against Artifactory APIs or connected build systems. Refer to the JFrog Security Advisories for vendor-published exploitation conditions and impacted versions.

No verified public proof-of-concept code is available at the time of publication. The vulnerability mechanism is described here in prose; consult the vendor advisory for technical specifics.

Detection Methods for CVE-2026-42017

Indicators of Compromise

Access-token creation or usage from user accounts that do not normally generate service tokens.
Repeated reads of event, webhook, or audit endpoints by low-privileged Artifactory users.
API calls performed by an administrative token from an IP address associated with a non-administrative user session.
Unexpected webhook subscriptions or event listeners created by lower-privileged accounts.

Detection Strategies

Correlate Artifactory access.log and request.log to identify sessions where a low-privileged user accesses event or webhook data followed by privileged API activity.
Compare the privilege level of the requesting user against the scope of tokens returned or referenced in responses.
Baseline normal event-endpoint consumers and alert on new principals reading event streams.

Monitoring Recommendations

Forward Artifactory audit, access, and request logs to a centralized SIEM for correlation and retention.
Enable alerting on administrative token usage and on any token generation by non-service accounts.
Monitor CI/CD pipelines that consume Artifactory credentials for unexpected authentication sources or geographies.

How to Mitigate CVE-2026-42017

Immediate Actions Required

Upgrade JFrog Artifactory to the fixed version listed in the JFrog Security Advisories.
Rotate all Artifactory access tokens, API keys, and service-account credentials, prioritizing administrative and CI/CD tokens.
Review recent audit logs for use of privileged tokens by unexpected principals and revoke any suspicious sessions.
Restrict Artifactory administrative interfaces to trusted networks until patching is complete.

Patch Information

JFrog has published fixed releases through the JFrog Release Documentation. Administrators should identify their current Artifactory version, consult the JFrog Security Advisories for the corresponding fixed version, and apply the upgrade following JFrog's documented procedure.

Workarounds

Enforce the principle of least privilege on Artifactory users and remove unused low-privilege accounts.
Disable or restrict event, webhook, and replication features that are not required for production workloads.
Shorten access-token lifetimes and require token rotation on a defined schedule.
Segment Artifactory administrative endpoints behind a reverse proxy with additional authentication controls.

bash

# Configuration example: identify Artifactory version and list active access tokens for review
curl -u admin:$ARTIFACTORY_PASS \
  https://artifactory.example.com/artifactory/api/system/version

curl -u admin:$ARTIFACTORY_PASS \
  https://artifactory.example.com/access/api/v1/tokens