Instatic-Stored-XSS-CVE-2026-103931

URL scheme filter bypass in isSafeUrl via leading C0 control characters Affected: Instatic v0.0.13 / commit 63ad5d6 and all earlier revisions containing src/core/html-sanitize/index.ts Component: src/core/html-sanitize/index.ts → isSafeUrl / safeUrl Class: CWE-79 Stored XSS via CWE-184 Incomplete...

Out-of-bounds Read

Overview github.com/gomarkdown/markdown/parser is a library for parsing Markdown text and rendering as HTML. Affected versions of this package are vulnerable to Out-of-bounds Read through the IsSafeURL function. An attacker can cause a panic and crash the application by supplying a specially...

gomarkdown/markdown IsSafeURL panics on short URLs

Summary IsSafeURL slices url:nPath before checking that lenurl = nPath, so a URL shorter than a path prefix 0, 1 or 2 bytes triggers a slice-bounds panic, and this is reached end to end when the html.Safelink hardening flag is enabled and the input contains an empty or very short link destination...

GHSA-CV23-7VC5-JFH7 gomarkdown/markdown IsSafeURL panics on short URLs

Summary IsSafeURL slices url:nPath before checking that lenurl = nPath, so a URL shorter than a path prefix 0, 1 or 2 bytes triggers a slice-bounds panic, and this is reached end to end when the html.Safelink hardening flag is enabled and the input contains an empty or very short link destination...

CVE-2026-102941 gomarkdown/markdown IsSafeURL panics on short URLs

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Prior to 0.0.0-20260724235538-61af6e1e6971, parser.IsSafeURL in parser/parser.go slices url:nPath before the lenurl = nPath guard. A short destination causes a slice-bounds panic when the...

CVE-2026-80347

mcp-fetch checks a fetch target against its SSRF guard without removing the brackets that surround an IPv6 literal. isSafeUrl reads the hostname from the parsed URL, which for a literal such as http://::1/ yields the bracketed string, and then tests it with net.isIP. That call returns zero for a...

CVE-2026-54494

Koel is a free, open-source music streaming solution. Prior to 9.7.1, App\Helpers\Network::isPublicHost uses filtervar with FILTERFLAGNOPRIVRANGE and FILTERFLAGNORESRANGE, which treats NAT64 64:ff9b::/96 and 6to4 2002::/16 wrappers of private, loopback, or link-local IPv4 addresses as public. An...