[dependabot]

Bumps sanitize-html from 2.17.7 to 2.18.0.

Changelog

Sourced from sanitize-html's changelog.

2.18.0 (2026-09-30)

Adds

• Added a logger option: pass any console-shaped object, with debug, info, warn and error methods, and sanitize-html's own diagnostics are delivered to it rather than to the console, so an application with a logging pipeline of its own can route them. Missing methods, and no option at all, fall back to the console. Those messages also lost their decorative line breaks and warning icon, so each is now a single line of text; their wording is otherwise unchanged.

Fixes

• allowedSchemesByTag is now applied to srcset and imagesrcset URLs. Previously the per-tag lookup used the attribute name instead of the tag name, so these attributes always fell back to the global allowedSchemes and ignored a tag-specific scheme allowlist. Thanks to spokodev for the fix.
• Starting in version 2.17.6, sanitize-html began escaping any markup preserved inside a disallowed iframe tag, which was a change in behavior due to an upstream change in htmlparser2. This fix ensures such "fallback markup" is preserved without escaping, but also fully sanitized according to the same rules as the original input. Thanks to sumitjhacodes for the fix.

Security

• When meta was allowed together with its http-equiv and content attributes, the destination URL of a <meta http-equiv="refresh" content="0;url=..."> was never checked against allowedSchemes, because it is embedded in content rather than being an attribute of its own. So javascript:, data: and other disallowed destinations passed through. The refresh URL is now extracted the way browsers do it, allowing for the different spellings, separators, quoting and letter case of url=, and checked against allowedSchemes (or allowedSchemesByTag.meta). If it is rejected, or the content cannot be parsed as a refresh, the content attribute is removed. content on other meta elements is unchanged. The default configuration does not allow meta and was not affected (CWE-79, CWE-601, GHSA-cv27-6wvh-8x7j).

  Thanks to adrbogacz for reporting the vulnerability.

• When noscript is listed in nonTextTags, the discarded region could end too early. Browsers with scripting enabled treat <noscript> content as raw text up to the first </noscript>, but the underlying parser treats it as markup, so an end tag for an enclosing element inside <noscript> closed it implicitly and the rest of its content was emitted as ordinary sanitized markup. The discard region now continues until the point where a browser would end the <noscript> element, while implied closes of other nonTextTags such as <option> behave as before (CWE-79, CWE-436, GHSA-x3q4-9hxx-gx8m).

  Thanks to joaquiniglesiaslug for reporting the vulnerability.

• The check that drops SVG animation elements (animate, animateColor, animateMotion, animateTransform, set) when they retarget a URL attribute such as href compared the full tag name, so a namespace-prefixed spelling like svg:animate was not recognized when such tags were allowed (for example with allowedTags: false). In XML serializations such as XHTML or standalone SVG, the prefixed element is a real animation element and could retarget a link to a javascript: URL after sanitization. The element and attributeName are now matched by their local names, ignoring any prefix (CWE-79, CWE-184, GHSA-374f-7chj-9948).

  Thanks to Kai Aizen (SnailSploit) for reporting the vulnerability.

Commits

• 9500b8b Latest reconciliation Q3 2026 (#5635)
• See full diff in compare view

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