CVE•Published 2026-04-29•Modified 2026-05-05•1 article on news•5 live references•NVD data
CVE-2026-42523Jenkins · Github
Vulnerability data via NVD (ingested)
CVSS v3.1
9.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS percentile
12
Exploit Prediction Scoring System · top 88% of all CVEs
Weaknesses (CWE)
Description
Jenkins GitHub Plugin 1.46.0 and earlier improperly processes the current job URL as part of JavaScript implementing validation of the feature "GitHub hook trigger for GITScm polling", resulting in a stored cross-site scripting (XSS) vulnerability exploitable by non-anonymous attackers with Overall/Read permission.
Timeline
Published 2026-04-29
Modified 2026-05-05
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-42523Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Jenkins Github"All exposed Jenkins Github instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Github"HTTP body or banner mentions "Github" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-42523Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42523Censys host search filtered to this CVE id.
grep.app
CVE-2026-42523Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42523GitHub code search for direct mentions.
Google dork
"CVE-2026-42523" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42523 on GitHub.