JFrog Artifactory Incorrect Authorization Vulnerability
TL;DR 📌
- 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.
- Highest CVSS: 8.1 (High).
- Listed in CISA KEV (2026-09-11) — this is being exploited in the wild.
- Fixed in
7.133.11— upgrade to this release or later. - CVEs: CVE-2026-42016.
What it is
CVE-2026-42016 is an incorrect authorization flaw in JFrog Artifactory (Self Hosted). The vulnerability sits in how Artifactory validates access tokens: it checks the token’s signature and issuer, but does not check the token’s scope. A token issued for one purpose can therefore be used to perform actions outside that scope.
The CVSS vector (AV:N/AC:L/PR:L/UI:N) indicates this is reachable over the network with low attack complexity and no user interaction, but it does require the attacker to hold some low-privilege credentials or a valid token in the first place. From there, the missing scope check allows privilege escalation — the attacker’s impact is limited to confidentiality and integrity (C:H/I:H), with no availability impact recorded.
The practical effect is that a low-privileged, authenticated caller can present a token to Artifactory’s API and have it accepted for operations it was never scoped to grant, because the server trusts the token’s signature/issuer as sufficient proof of authorisation rather than enforcing scope boundaries.
This CVE is listed in the CISA Known Exploited Vulnerabilities catalogue, added on 2026-09-11, so it is known to be exploited.
What to do
- Upgrade JFrog Artifactory (Self Hosted) to version 7.133.11 or later, which contains the fix for this scope validation issue.
- Given the CISA KEV listing, prioritise this patch over routine maintenance windows — treat it as an active-exploitation case for remediation scheduling.
- Audit existing access tokens and any recently issued low-privilege tokens for signs of use outside their intended scope, particularly against administrative or repository-management endpoints.
- After upgrading, review Artifactory’s access logs for token use patterns that predate the patch, to establish whether scope-bypassing calls occurred.
- If you cannot patch immediately, restrict which accounts can generate or hold Artifactory access tokens, and tighten network exposure of the Artifactory management API until the upgrade is applied.
For leadership 🧭
Executive summary. Any authenticated user holding an Artifactory access token, even a low-privilege one, can potentially use it to perform actions outside its intended scope, including against administrative or repository-management functions. This flaw is already listed as actively exploited, so patching should be treated as urgent rather than scheduled into routine maintenance.
Why it matters:
- The flaw is in Artifactory’s own token validation logic: signature and issuer are checked, but scope is not, so a token minted for a narrow purpose can be presented for broader operations.
- Because attack complexity is low and no user interaction is needed, any low-privileged credential or token already in circulation is a potential escalation path against the Artifactory API.
- Confidentiality and integrity impact are both rated high, meaning successful abuse could expose or alter artifacts and repository configuration, a direct risk to software supply chain integrity.
- Active exploitation is confirmed via CISA KEV listing, so unpatched, internet-reachable Artifactory instances are a live target, not a theoretical one.
Now / Next / Later:
- Now: Identify all self-hosted Artifactory instances still below version 7.133.11 and confirm which are reachable from outside trusted networks.
- Next: Upgrade Artifactory to 7.133.11 or later in the next available change window, prioritised ahead of routine patching given the KEV listing.
- Later: Establish routine auditing of issued access tokens and their scope usage, and review access logs after the upgrade to check for scope-bypassing calls that occurred before the patch.