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GitHub Advisory Database

Security vulnerability database inclusive of CVEs and GitHub originated security advisories from the world of open source software.

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LeafKit allows XSS with untrusted user input Moderate
CVE-2021-37634 was published for github.com/vapor/leaf-kit (Swift) Jun 9, 2023
alextrob Credited to alextrob
Leaf-kit html escaping does not work on characters that are part of extended grapheme cluster Moderate
CVE-2026-27120 was published for leaf-kit (Swift) Feb 19, 2026
bawolff Credited to bawolff, ptoffy, 0xTim, and gwynne ptoffy ptoffy
0xTim 0xTim gwynne gwynne
LeafKit's HTML escaping may be skipped for Collection values, enabling XSS Moderate
CVE-2026-28499 was published for leaf-kit (Swift) Mar 16, 2026
iCMDdev Credited to iCMDdev, gwynne, and 0xTim gwynne gwynne
0xTim 0xTim
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