Moole Vulnerability Database

Find real vulnerabilities before they ship

Medium

CVE-2026-28499

LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template prints a collection (Array / Dictionary) via `#(value)`. This can result in XSS, allowing potentially untrusted input to be rendered unescaped. Version 1.14.2 fixes the issue.

VectorNETWORK

PublishedMar 18, 2026, 02:16

Published Bysecurity-advisories@github.com

Base Score

Score6.1

Affected Versions

Package (Ecosystem)IntroducedFixedLimit

github.com/vapor/leaf-kit(SwiftURL)01.14.2N/A

References

https://github.com/vapor/leaf-kit/commit/6044b844caa858a0c5f2505ac166f5a057c990dc
https://github.com/vapor/leaf-kit/releases/tag/1.14.2
https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473

Weakness Type

CWE-79

CVSS Metrics

Base Score

6.9

Vector String

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Base SeverityMedium

Version

4.0

Attack Vector (AV)

NETWORK