JFrog Artifactory Vulnerability CVE-2026-42016: Critical Exploit in the Wild
- Severity
- HIGH
- Affected component
- jfrog artifactory (npm)
- Patched version
- Not yet available
JFrog Artifactory has a confirmed high-severity vulnerability, CVE-2026-42016, which is being actively exploited. Users of JFrog Artifactory are advised to take immediate action.
What happened
The vulnerability in JFrog Artifactory, tracked as CVE-2026-42016, allows for privilege escalation due to insufficient validation of token scopes. Attackers can exploit this flaw to gain administrative control over self-hosted servers. This issue was first flagged and confirmed on September 11, 2026. Multiple sources report that attackers are chaining this flaw with others to deploy backdoors.
According to cloud security company Wiz, the exploit chain involves obtaining an internal anonymous-user token via CVE-2026-42018 and then swapping it for an administrator-level token using CVE-2026-42016. This allows attackers to perform administrative actions that appear in logs as token:anonymous.
To assess your exposure, review your JFrog Artifactory configurations and logs for any signs of unauthorized administrative actions. Ensure that your instance is updated to the latest version and that access controls are properly configured.
What to do about it
- Upgrade to the latest version of JFrog Artifactory immediately.
- Review and strengthen access controls within your JFrog Artifactory instance.
- Monitor logs for any suspicious activity, particularly actions logged under token:anonymous.
- Consult the primary sources for the most current information and additional mitigation strategies.
How 0Day would have caught this
jfrog artifactory is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.
Frequently asked questions
Am I affected?
If you are using JFrog Artifactory, you may be affected. No specific version range has been published yet, so it is recommended to upgrade to the latest version as a precaution.
What should I do right now?
Upgrade to the latest version of JFrog Artifactory and review your access controls. Monitor your logs for any suspicious activity.
Has this been exploited in the wild?
Yes, this vulnerability is being actively exploited. Ensure your instance is patched and secure.
Sources
- Attackers Chain JFrog Artifactory Flaws to Gain Admin Control and Plant Backdoors
- CISA Adds 5 Actively Exploited Artifactory, ScreenConnect, and RouterOS Flaws to KEV
- Artifactory flaws chained in attacks deploying backdoor malware
- [CISA KEV] CVE-2026-42016 — JFrog Artifactory
- [CISA KEV] CVE-2026-42018 — JFrog Artifactory
- Three JFrog Artifactory Flaws Exploited for Backdoor Deployment
- More JFrog Artifactory bugs under attack, and all 3 have patches