CVE-2026-40472

CRITICAL EPSS 21.9%

Published Apr 23, 20262mo ago · Modified Jun 17, 20262w ago

9.9 CVSS 3.1

Critical

Published Apr 23, 2026 2mo ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

9.9

Exploitability

3.1

Impact

6.0

Vector string

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

Threat Intelligence

EPSS Exploit Probability

21.9% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 1

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.