CVE-2026-28499

EUVD-2026-12696
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 2.95%
Affected Products (NVD)
VendorProductVersion
vaporleafkit
𝑥
< 1.14.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
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
https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473