CVE-2026-40472
Hackage package metadata stored XSS vulnerability
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Published | Apr 23, 2026 |
| Last Updated | Apr 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low