{"id":81706,"date":"2026-07-08T20:47:28","date_gmt":"2026-07-08T17:17:28","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-59929-mistune-renderers-html-safe_url-harmful_protocols-list-misses-legacy-and-chained-schemes-that-historically-chain-to-javascript-execution\/"},"modified":"2026-07-08T20:47:28","modified_gmt":"2026-07-08T17:17:28","slug":"cve-2026-59929-mistune-renderers-html-safe_url-harmful_protocols-list-misses-legacy-and-chained-schemes-that-historically-chain-to-javascript-execution","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-59929-mistune-renderers-html-safe_url-harmful_protocols-list-misses-legacy-and-chained-schemes-that-historically-chain-to-javascript-execution\/","title":{"rendered":"CVE-2026-59929 &#8211; Mistune renderers\/html.safe_url: HARMFUL_PROTOCOLS list misses legacy and chained schemes that historically chain to `javascript:` execution"},"content":{"rendered":"<p>CVE ID :CVE-2026-59929<\/p>\n<p>  Published : July 8, 2026, 5:17 p.m. | 31\u00a0minutes ago<\/p>\n<p>  Description :Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src\/mistune\/renderers\/html.py blocks only javascript:, vbscript:, file:, and data: schemes, allowing legacy or chained schemes such as feed:, view-source:, jar:, livescript:, mocha:, ms-its:, mk:, and res: to reach rendered href and src attributes and potentially execute script in affected user agents. This issue is fixed in version 3.3.0.<\/p>\n<p>  Severity: 6.1 | MEDIUM<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-59929 Published : July 8, 2026, 5:17 p.m. | 31\u00a0minutes ago Description :Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src\/mistune\/renderers\/html.py blocks only javascript:, vbscript:, file:, and data: schemes, allowing legacy or chained schemes such as feed:, view-source:, jar:, livescript:, mocha:, ms-its:, mk:, and &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-81706","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=81706"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81706\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=81706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=81706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=81706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}