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CVE-2026-28499

MEDIUM

6.1

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.

CVE Details

CVSS v3.1 Score6.1

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/18/2026

Last Modified3/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

vapor:leafkit

Weaknesses (CWE)

CWE-79CWE-80CWE-116

References

https://github.com/vapor/leaf-kit/commit/6044b844caa858a0c5f2505ac166f5a057c990dc(security-advisories@github.com)

https://github.com/vapor/leaf-kit/releases/tag/1.14.2(security-advisories@github.com)

https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473(security-advisories@github.com)

https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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