CVE-2026-42018 — Artifactory
HIGHCVE-2026-42018 is a high-severity (CVSS 7.5) Improper Authentication vulnerability in jfrog artifactory. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-09-11) — treat it as actively exploited and patch now. A fix is available — see the affected versions and patch details below.
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2026-09-11. Federal agencies were required to remediate by 2026-09-25.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2026-42018.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-42018 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 384,189 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Description
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
Affected Products
artifactoryjfrogDetection & mitigation playbook
Vendor / applianceDetect
Inventory every jfrog artifactory deployment and check each version against the affected-products list above.
Fix
Apply the jfrog artifactory security patch or hotfix for CVE-2026-42018 on the affected version, following the vendor advisory for your exact build.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2026-42018
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2026-42018 -u https://target- Template
- JFrog Artifactory - Anonymous Token Disclosure via Trailing Slash Auth Bypass
- Severity
- high
- Impact
- Unauthenticated attackers can access sensitive resources by obtaining internal tokens, potentially leading to information disclosure.
- Remediation
- Update to the latest version where this issue is fixed.
Template by ProjectDiscovery nuclei-templates (theamanrawat), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2026-42018 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.