CVE-2026-42018
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
do firstApply 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.
Can a WAF block it? Partly. Cloudflare publishes WAF a rule written for this CVE. Such rules block the known exploit requests and buy time, but attackers can change the request to get past them, so they do not replace the patch.
Cloudflare · 1 rule (Block) · since 25 Sept 2026
- JFrog Artifactory - Authentication Bypass - CVE:CVE-2026-42018 · Cloudflare Managed Ruleset
Also consider: patch · enable the vendor rule in block mode · add auth middleware
Based on WAF vendor rules published for this CVE. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2026-42018 being exploited?
Yes. CVE-2026-42018 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-42018?
CVE-2026-42018 is rated High with a CVSS score of 7.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-42018?
Yes. A fix has been recorded for CVE-2026-42018. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42018 affect?
CVE-2026-42018 affects jfrog:artifactory. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
- affected< 7.111.20
- affected>= 7.117.0 and < 7.117.27
- affected>= 7.125.0 and < 7.125.19
- affected>= 7.133.0 and < 7.133.28
- affected>= 7.146.0 and < 7.146.8
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
public exploits
Detection templates only, no public exploit found: 1 Nuclei template
- JFrog Artifactory - Anonymous Token Disclosure via Trailing Slash Auth Bypass · detection template · high
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- yes
- technical impact
- partial
Assessed by CISA 1 Oct 2026 (SSVC 2.0.3).
timeline
- 12 Aug 2026Published
- 11 Sept 2026Added to CISA KEV (exploited in the wild) · 29 days later
- 25 Sept 2026CISA remediation due date (US federal agencies) · 14 days later
- 1 Oct 2026CISA SSVC assessment: exploitation active · 7 days later
- 1 Oct 2026CVE record last updated · same day later
- 2 Nov 2026Analysed by vulneraibility.com · 32 days later
- Advisorydocs.jfrog.com /releases/docs/jfrog-security-advisories
- Advisorydocs.jfrog.com /releases/docs/artifactory-self-managed-releases
- Advisorywiz.io /blog/artifactory-under-attack-in-the-wild-exploitation-of-cve-2026-42016-cve-20
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42018
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Nuclei templates: detection templates
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.