CVE-2026-40472 CRITICAL

CVE-2026-40472: Hackage package metadata stored XSS vulnerability

Weakness CWE-79 · XSS

Published April 23, 2026

Last update April 23, 2026

View on NVD All CVEs

CVSS base score

9.9/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality High

Integrity High

CVSS vector

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

What the vulnerability does

01Description

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 dates

02Disclosure timeline

April 23, 2026 CVE published

April 23, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-40472 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html

Related vulnerabilities

04Related CVE

CVE-2025-6347 code-projects Responsive Blog pageViewMembers.php cross site scripting CVE-2026-41250 XSS in taiga-front CVE-2025-23624 WordPress WpDevTool plugin <= 0.1.1 - Reflected Cross Site Scripting (XSS) vulnerability CVE-2025-13488 Nexus Repository 3 - Stored Cross-Site Scripting (XSS) CVE-2024-43362 Stored Cross-site Scripting (XSS) when creating external links in Cacti