๐Ÿ›ก๏ธ CVE-2026-40470
๐Ÿ”ด CVSS 9.9 โ€” Critical โœ… No Known Exploit NVD
9.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A critical XSS vulnerability affected hackage-server and hackage.haskell.org. HTML and JavaScript files provided in source packages or via the documentation upload facility were served as-is on the main hackage.haskell.org domain. As a consequence, when a user with latent HTTP credentials browses to the package pages or documentation uploaded by a malicious package maintainer, their session can be hijacked to upload packages or documentation, amend maintainers or other package metadata, or perform any other action the user is authorised to do.

Details

Severity Critical
CVSS Score 9.9
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
CWE N/A
Public Exploit โœ… No
Source NVD
Published 2026-01-16
Updated 2026-06-02
Modified 2026-04-14

Affected Packages

Software From version Fixed in
hackage-server 0.1 0.6
unknown โ€” โ€”

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