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CVE-2026-84673

HIGH
8.8
CVSS Score
Published: September 2, 2026 at 03:40 PM UTC
Updated: September 3, 2026 at 05:24 PM UTC
1 product affected across 1 vendorCustomizable Header

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Severity
HIGH8.8
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Customizable Header· Jenkinsjenkins-plugin
60%
v ≤ 295.v2544b_ca_19b_97

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4104

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79

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