CVE-2026-40472

—

CVSS 3.1

9.9 critical

EPSS

<1%p23

Published

Apr 23, 2026 (Apr 23, 2026)

Modified

Jun 17, 2026

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.

Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

NVD CVE.org GitHub PoCs EPSS (0.3%)

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