PT-2026-32988 · Hackage · Hackage-Server

Published 2026-03-28 · Updated 2026-04-23 · CVE-2026-40472

Positive Technologies (AI Summary)

CVSS v3.1

9.9

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions hackage-server versions prior to 2de3ae45082f8f3f29a41f6aff620d09d0e74058

Description User-controlled metadata from .cabal files are rendered into HTML 'href' attributes without proper sanitization, enabling stored Cross-Site Scripting (XSS), which is a technique where malicious scripts are injected into trusted websites. The affected fields include homepage, bug-reports, source-repository.location, and description (Haddock hyperlinks).

Recommendations Update to commit 2de3ae45082f8f3f29a41f6aff620d09d0e74058 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-40472

HSEC-2026-0004

Affected Products

Hackage-Server

References · 5

• https://osv.dev/vulnerability/HSEC-2026-0004 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40472 · Security Note
• https://github.com/haskell/hackage-server/commit/2de3ae45082f8f3f29a41f6aff620d09d0e74058 · Note
• https://github.com/haskell/security-advisories · Note
• https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export · Note