CVE-2026-41305 - PostCSS has XSS via Unescaped </style> in its CSS Stringify Output

CVE-2026-41305 - PostCSS has XSS via Unescaped </style> in its CSS Stringify Output

https://cvefeed.io/rssfeed/latest.atom / Fri, 04/24/2026 - 08:20
CVE ID :CVE-2026-41305
Published : April 24, 2026, 3:16 a.m. | 2 hours, 57 minutes ago
Description :PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Versions prior to 8.5.10 do not escape `` sequences when stringifying CSS ASTs. When user-submitted CSS is parsed and re-stringified for embedding in HTML `` in CSS values breaks out of the style context, enabling XSS. Version 8.5.10 fixes the issue.
Severity: 6.1 | MEDIUM
Visit the link for more details, such as CVSS details, affected products, timeline, and more...

About

Kenya Education Network CERT(KENET-CERT) is a Cybersecurity Emergency Response Team and Co-ordination Center operated by the National Research and Education Network of Kenya. KENET-CERT coordination center promotes awareness on cybersecurity incidences as well as coordinates and assists member institutions in responding effectively to cyber security threats and incidences. KENET-CERT works closely with Kenya's National CIRT coordination center (CIRT/CC) as a sector CIRT for the academic institutions. KENET promotes use of ICT in Teaching, Learning and Research in Higher Education Institutions in Kenya. KENET aims to interconnect all the Universities, Tertiary and Research Institutions in Kenya by setting up a cost effective and sustainable private network with high speed access to the global Internet. KENET also facilitates electronic communication among students and faculties in member institutions, share learning and teaching resources by collaboration in Research and Development of Educational content.