CVE-2026-5751: falha de média gravidade em EmilStenstrom justhtml
justhtml before 1.14.0 Mutation XSS via custom sanitization policies
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 5.1epss 0.3%
justhtml versions 1.13.0 and earlier contain a parser-differential / mutation cross-site scripting (mXSS) vulnerability when using a custom SanitizationPolicy that preserves foreign namespaces (e.g., drop_foreign_namespaces=False with allowlisted SVG/MathML elements or raw-text containers such as <style>). Specially crafted input can sanitize into markup that appears safe but becomes unsafe when re-parsed by a browser or another HTML parser, allowing markup injection. The default safe configuration (sanitize=True) is not affected. Fixed in 1.14.0.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Produtos afetados
EmilStenstrom · justhtmlCVEs relacionadas — EmilStenstrom justhtml
No mesmo produto, das mais perigosas para as menos.
CVE-2026-4671HIGHjusthtml before 1.18.0 Denial of Service via CSS SelectorEPSS 0.7%CVE-2026-8445CRITICALjusthtml before 1.12.0 Sanitizer Bypass via MarkdownEPSS 0.6%CVE-2026-7808CRITICALjusthtml before 1.16.0 Multiple Security Issues via SanitizationEPSS 0.6%CVE-2026-5388CRITICALjusthtml before 1.15.0 Multiple Security IssuesEPSS 0.6%CVE-2026-9769HIGHjusthtml before 1.10.0 Denial of Service via deeply nested HTMLEPSS 0.3%CVE-2026-8630MEDIUMjusthtml before 1.12.0 Mutation XSS via Raw Text ElementsEPSS 0.3%