CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, само при определена конфигурация или състояние на системата, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in HtmlSanitizeEx.Scrubber.CSS.scrub/1 matches the property name with an unbounded greedy [-\w]+ followed by a mandatory :, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB <style> body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive. The impact is CPU exhaustion only. Nothing is read, modified or disclosed. This issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3.
Засегнати продукти
- rrrene html_sanitize_ex: 0.3.1 преди 1.4.5; 1.5.0-rc.0 преди 1.5.3
- rrrene html_sanitize_ex: от 21f90012eb21aa36f4e3701b7547e12faf0f3c8b нататък
Вид слабост
История
- 6 август 2026 Публикувано
Други уязвимости в rrrene html_sanitize_ex
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-68749
- https://nvd.nist.gov/vuln/detail/CVE-2026-68749
- https://github.com/rrrene/html_sanitize_ex/security/advisories/GHSA-4cx2-987x-rr2x
- https://cna.erlef.org/cves/CVE-2026-68749.html
- https://osv.dev/vulnerability/EEF-CVE-2026-68749
- https://github.com/rrrene/html_sanitize_ex/commit/4f4bd9eb254881462c0461fbab74b29188c2c133
- https://github.com/rrrene/html_sanitize_ex/commit/b673df33ddf982c8bd0a8bd6348aa247080b3b14