Vulnerability details
CVE-2026-40472
Hackage package metadata stored XSS vulnerability
CVSS 3.1
9.9Critical
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.9Critical | 3.1 | CVEProject cvelistV5 (CNA) (redhat-cnalr) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
1
Kolun on Telegram @kolunsec
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Details
- Published
- 2026-04-23
- Last updated
- 2026-04-23
- State
- Published
- Assigner (CNA)
- redhat-cnalr
Exploit prediction (EPSS)
0.3%
Probability of exploitation in 30 days
23.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-79Improper neutralization of input during web page generation ('cross-site scripting')