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CVE-2026-40472criticalCWE-79

Hackage package metadata stored XSS vulnerability

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.9epss 0.3%
exploitation probability
0.3%top 77% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Affected products
hackage-server