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HIGH

CVE-2026-84673

CVSS v3

8.8

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

none

SSVC status

Description

Jenkins Customizable Header Plugin 295.v2544b_ca_19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability.

Technical details

Published
2026-09-02
Last Modified
2026-09-02

Frequently asked questions

What is CVE-2026-84673?

Jenkins Customizable Header Plugin 295.v2544b_ca_19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability.

Is CVE-2026-84673 actively exploited?

Active exploitation of CVE-2026-84673 has not been confirmed. Its EPSS score was 0.5% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-84673?

CVE-2026-84673 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2026-84673 affecting your environment?

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