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CVE-2026-126945VulnerabilityPublished

Zipline before 4.5.1 contains a stored cross-site scripting vulnerability in the HighlightCode component that renders

Source GCVE Database

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Authoritative record:CVE-2026-126945· Critical 9.3

Not known to be exploited · CVSS 9.3 Critical : upgrade to 4.5.1 as a priority.

Data as of 13 Nov 2026, 13:54 UTC

CVSS 4.0 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.09.3
CNA (VulnCheck)CVSS 3.18.7
Patch
Available – fixed in 4.5.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade zipline to 4.5.1.

Affected software

ProductAffectedFixed in
dicedziplineAffected
  • <4.5.1
Fixed in
  • 4.5.1

AI-suggested

A fix is available in Zipline version 4.5.1 and later. Users should upgrade to version 4.5.1 or newer to remediate this vulnerability. There is no indication that any other mitigation or temporary workaround is recommended or required.

Description

Zipline versions before 4.5.1 have a stored cross-site scripting (XSS) vulnerability in the HighlightCode component. This flaw allows authenticated users to upload text files with malicious HTML/JavaScript that execute in other users' browsers when the file content is rendered unescaped. The vulnerability enables attackers to perform actions such as changing account details on behalf of victims.

References

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