CVE-2026-28499

6.1 MEDIUM
Published: March 18, 2026 Modified: March 18, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/vapor/leaf-kit/releases/tag/1.14.2
Source: security-advisories@github.com
Release Notes
https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473
Source: security-advisories@github.com
Exploit Vendor Advisory
https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.1 / 10.0
EPSS (Exploit Probability)
0.0%
8th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

vapor