CVE-2026-42018 (GCVE-0-2026-42018)

Vulnerability from cvelistv5 – Published: 2026-08-12 17:43 – Updated: 2026-09-12 03:55
VLAI CISA Previdian
Title
Anonymous user token generation exposure in JFrog Artifactory
Summary
JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: active Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 00:00 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version CPE status
jfrog artifactory Affected: 0 , < 7.111.20 (custom)
Affected: 7.117.0 , < 7.117.27 (custom)
Affected: 7.125.0 , < 7.125.19 (custom)
Affected: 7.133.0 , < 7.133.28 (custom)
Affected: 7.146.0 , < 7.146.8 (custom)
guessed Create a notification for this product.
Credits
Daniil Vylegzhanin (NetSPI)
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c9519166-323e-490a-9953-a332398615ad

Vulnerability ID: CVE-2026-42018

Status: Confirmed

Status Updated: 2026-09-11 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-11
Asserted: 2026-09-11
Scope
Notes: JFrog Artifactory Improper Authentication Vulnerability | Affected: JFrog / Artifactory | Description: 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. | Required action: 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. | Due date: 2026-09-25 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://docs.jfrog.com/releases/docs/jfrog-security-advisories ; https://docs.jfrog.com/releases/docs/artifactory-self-managed-releases ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: 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
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-287
Feed CISA Known Exploited Vulnerabilities Catalog
Product Artifactory
Due Date 2026-09-25
Date Added 2026-09-11
Vendorproject JFrog
Vulnerabilityname JFrog Artifactory Improper Authentication Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-09-11 19:00 UTC | Updated: 2026-09-11 19:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 43719310-bca4-4146-99da-52be865a9473

Vulnerability ID: CVE-2026-42018

Status: Confirmed

Status Updated: 2026-09-10 19:04 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-10
Asserted: 2026-09-10
Scope
Notes: Anonymous user token generation exposure in JFrog Artifactory | Affected: Jfrog / artifactory | CVSS: 7.5 (HIGH) | EPSS: 0.00349 | Used in malware: unknown | Listed 23 hours ahead of CISA KEV | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Anonymous user token generation exposure in JFrog Artifactory
Cve Id CVE-2026-42018
Vendor Jfrog
Ghsa Id GHSA-3Q94-GPRH-7PWM
Product artifactory
Added Date 2026-09-10T19:04:00.000Z
Cvss Score 7.5
Epss Score 0.00349
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.28044
Used In Malware unknown
Vulnerability Id CVE-2026-42018
Ahead Of Cisa Kev 
{
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  "unit": "hour"
}
Not Yet In Cisa Kev False
References
Created: 2026-09-11 20:01 UTC | Updated: 2026-09-11 20:01 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.