CVE-2026-42018: JFrog Artifactory Improper Authentication Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 11 Sep 2026, 30 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 9.8%
EPSS score, percentile 95.5 of all scored records
- How severe?
- 7.5 High
CVSS v3.1 base score, given by the CNA
- What should I do?
Required action (CISA), due 25 Sep 2026: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- Which versions are affected?
Affected: before 7.111.20; 7.117.0 up to, not including, 7.117.27; 7.125.0 up to, not including, 7.125.19; 7.133.0 up to, not including, 7.133.28; 7.146.0 up to, not including, 7.146.8
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA due date for this action: 25 September 2026.
Advisories and patches
Linked from CISA's catalog entry
- https://docs.jfrog.com/releases/docs/jfrog-security-advisories
- https://docs.jfrog.com/releases/docs/artifactory-self-managed-releases
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-42018
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | before 7.111.20 |
| Affected | 7.117.0 up to, not including, 7.117.27 |
| Affected | 7.125.0 up to, not including, 7.125.19 |
| Affected | 7.133.0 up to, not including, 7.133.28 |
| Affected | 7.146.0 up to, not including, 7.146.8 |
Versions not listed are: unaffected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
JFrog Artifactory contains an improper authentication vulnerability that could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2026-42018 to its Known Exploited Vulnerabilities (KEV) catalog on 11 Sep 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 25 Sep 2026.
- The CVE record was published on 12 Aug 2026, 30 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 7.5 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 9.8% (percentile 95.5), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
Anonymous user token generation exposure in JFrog Artifactory
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-287: Improper Authentication
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 12 Aug 2026 | CVE record published |
| 11 Sep 2026 | Added to CISA KEV |
| 25 Sep 2026 | CISA due date for the required action |
| 1 Oct 2026 | CVE record last updated |
More exploited JFrog vulnerabilities
- CVE-2026-42016: JFrog Artifactory Incorrect Authorization Vulnerability
- CVE-2026-82329: JFrog Artifactory Improper Authentication Vulnerability
- CVE-2026-66384: JFrog Artifactory Improper Limitation of a Pathname to a Restricted Directory Vulnerability