---
title: "CVE-2026-119331: Ladybird - Broken Access Control"
description: "Ladybird web browser contains a broken access control vulnerability caused by missing enforcement of the stylesheet origin-clean flag in CSSStyleSheet methods, letting malicious pages read and modify cross-origin stylesheets, bypassing Same-Origin Policy."
url: https://panop.io/threat-heartbeat/CVE-2026-119331/
---

# CVE-2026-119331 Ladybird - Broken Access Control

Ladybird web browser contains a broken access control vulnerability caused by missing enforcement of the stylesheet origin-clean flag in CSSStyleSheet methods, letting malicious pages read and modify cross-origin stylesheets, bypassing Same-Origin Policy.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-119331)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering

CVSS vector

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

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-200](https://cwe.mitre.org/data/definitions/200.html)

## Vendor fix

Update to the version including commit c0d68bddf3e3616e5173835f0f4c155ee9700d91 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-119331](https://nvd.nist.gov/vuln/detail/CVE-2026-119331)
- [https://github.com/LadybirdBrowser/ladybird/commit/c0d68bddf3e3616e5173835f0f4c155ee9700d91](https://github.com/LadybirdBrowser/ladybird/commit/c0d68bddf3e3616e5173835f0f4c155ee9700d91)
- [https://github.com/LadybirdBrowser/ladybird/security/advisories/GHSA-xj66-c4cw-xwh3](https://github.com/LadybirdBrowser/ladybird/security/advisories/GHSA-xj66-c4cw-xwh3)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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