CVE-2026-126945

HIGH 8.7

Zipline before 4.5.1 Stored XSS via HighlightCode Component

CVSS Score

8.7

EPSS Score

0.0%

EPSS Percentile

0th

Zipline before 4.5.1 contains a stored cross-site scripting vulnerability in the HighlightCode component that renders unescaped file content before highlight.js finishes loading. Authenticated attackers can upload text files containing HTML/JavaScript payloads that execute in viewers' browsers, enabling API calls such as account changes on the victim's behalf.

CWE	CWE-79
Vendor	diced
Product	zipline
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

diced / zipline

0 < 4.5.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/diced/zipline/security/advisories/GHSA-m649-gvwx-j6qv vulncheck.com: https://www.vulncheck.com/advisories/zipline-before-4.5.1-stored-xss-via-highlightcode-component

Credits

🔍 mtolley