CVE-2026-28499 describes a Cross-Site Scripting (XSS) vulnerability in the LeafKit templating language, affecting versions prior to 1.14.2. The flaw stems from incorrect HTML escaping when printing collections (Arrays/Dictionaries), allowing potentially untrusted input to be rendered unescaped. This vulnerability is rated Medium severity (CVSS 6.1), with a network attack vector, low complexity, and requiring user interaction for exploitation. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.14.2CPE matchmatch criteria | cpe:2.3:a:vapor:leafkit:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.