CVE-2026-40472CRITICAL 9.9EPSS p21.7%

CVE-2026-40472CVE-2026-40472

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.

Scoring

CVSS 3.19.9 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
EPSS0.30% probability of exploitation · percentile 21.7% · 2026-06-19T12:03:05Z
Published2026-04-23
Last modified2026-04-24

Underlying weaknesses· 1

CWE-79

References

  1. https://osv.dev/vulnerability/HSEC-2026-0004

1

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting')cwe-790%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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CVE-2026-40470
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CVE-2026-40471
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Apache HTTP Server Improper Escaping of Output Vulnerability
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CVE-2026-47345
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CVE-2026-35466
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CVE-2026-9646
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.