# CVE-2026-40472

> Vulnerability · severity: **CRITICAL** (CVSS 9.9).

## Description

In hackage-server, user-controlled metadata from .cabal files are rendered into HTML
href attributes without proper sanitization, enabling stored
Cross-Site Scripting (XSS) attacks.

## Key facts

- **CVE ID:** CVE-2026-40472
- **Published:** 2026-04-23
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.9
- **CWE codes:** CWE-79

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40472

## Citation

> AI Analytics. CVE-2026-40472. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-40472. Derived from NIST NVD. Licensed CC0.

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