CVE-2026-42523: XSS

Q: What is the severity of CVE-2026-42523?

CVE-2026-42523 is classified as a high severity vulnerability due to the potential for stored cross-site scripting (XSS) attacks.

Q: How do I fix CVE-2026-42523?

To fix CVE-2026-42523, upgrade the Jenkins GitHub Plugin to version 1.47.0 or later.

Q: Who is affected by CVE-2026-42523?

CVE-2026-42523 affects users of Jenkins GitHub Plugin version 1.46.0 and earlier.

Q: What type of attack is associated with CVE-2026-42523?

CVE-2026-42523 is associated with stored cross-site scripting (XSS) attacks.

Q: Can CVE-2026-42523 be exploited by anonymous users?

No, CVE-2026-42523 can be exploited only by non-anonymous attackers with specific permissions.

Published Apr 29, 2026

Updated

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.

Affected Software

2 affected components

Jenkins GitHub Plugin<=1.46.0

Jenkins Github Jenkins<1.46.0.1

Event History

Apr 29, 2026

CVE Published

via MITRE·01:31 PM

Data Sourced

via MITRE·01:31 PM

Description

Data Sourced

via NVD·02:16 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2026-42523?

CVE-2026-42523 is classified as a high severity vulnerability due to the potential for stored cross-site scripting (XSS) attacks.

How do I fix CVE-2026-42523?

To fix CVE-2026-42523, upgrade the Jenkins GitHub Plugin to version 1.47.0 or later.

Who is affected by CVE-2026-42523?

CVE-2026-42523 affects users of Jenkins GitHub Plugin version 1.46.0 and earlier.

What type of attack is associated with CVE-2026-42523?

CVE-2026-42523 is associated with stored cross-site scripting (XSS) attacks.

Can CVE-2026-42523 be exploited by anonymous users?

No, CVE-2026-42523 can be exploited only by non-anonymous attackers with specific permissions.

Company

Resources

Contact

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