9

CVE-2026-42523: jenkins project jenkins github plugin Cross-site Scripting

CVSS: 9.0v3.1CriticalAnalyzed
AliasesGHSA-w22p-4x9f-486v
Published 29-04-2026Last modified 29-04-2026
Open JSON

Vulnerability summary

CVE-2026-42523 is a critical (CVSS 9.0) Cross-site Scripting vulnerability in jenkins project jenkins github plugin. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.0/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.50%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 29-04-2026
    PublishedVulnerability first disclosed.
  2. 29-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.21 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Com.coravy.hudson.plugins.github1 product
  • github< 1.46.0.1
Jenkins1 product
Jenkins project1 product

3 vendors · 3 products

References

3 links