JFrog Artifactory Improper Authentication Vulnerability
JFrog Artifactory returns an internal anonymous-user token to unauthenticated callers even when anonymous access is disabled, allowing unauthorized resource access and enabling privilege escalation chains.
- Vendor
- JFrog
- Product
- Artifactory
- CVSS
- 7.5
- EPSS (exploit probability)
- 10.0%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Published
Is CVE-2026-42018 being exploited?
Yes. CISA added CVE-2026-42018 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 10.0% (scored November 4, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-05. Full cross-catalog view: /kev-comparison
CVE-2026-42018 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
US federal civilian agencies must remediate by (14 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
CVE-2026-42018 is an improper authentication vulnerability in JFrog Artifactory. When anonymous access is disabled on an Artifactory instance, an unauthenticated caller can still obtain an internal anonymous-user token through a flaw in the authentication handling path. That token provides access to resources that should require credentials.
CISA added CVE-2026-42018 to its Known Exploited Vulnerabilities catalog on September 11, 2026, with a remediation deadline of September 25, 2026. Active exploitation was observed before the KEV addition: threat actors are chaining this flaw with additional high and critical-severity Artifactory vulnerabilities to escalate from unauthenticated access to administrative control, then deploying a Rust-written backdoor on self-managed instances.
Fix: Apply patches from JFrog’s security advisories page. Confirm your Artifactory version is at or above the patched release listed there.
NVD record: CVE-2026-42018
Other JFrog Artifactory CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-42016 JFrog Artifactory Incorrect Authorization Vulnerabilitywrite-up | [ HIGH ] | 8.1 | 8.6% | |
| CVE-2026-82329 JFrog Artifactory Default Authentication Weakness Grants Admin Accesswrite-up | [ CRITICAL ] | 9.8 | 14.4% | |
| CVE-2026-66384 JFrog Artifactory Improper Limitation of a Pathname to a Restricted Directory Vulnerability | [ MEDIUM ] | 5.3 | 0.7% |
