chore(deps): bump sanitize-html from 2.18.0 to 2.18.1

Merged
DE
4d ago
+3-4

Bumps sanitize-html from 2.18.0 to 2.18.1.

Changelog

Sourced from sanitize-html's changelog.

2.18.1 (2026-10-14)

Changes

  • Remove the deepmerge dependency, which was used only to combine tag-specific and * (all tags) entries in allowedClasses and allowedStyles. That is now done by a few lines of code within sanitize-html.

    This is not a fix for a vulnerability in sanitize-html. Security scanners such as Snyk now report CVE-2026-93753 in deepmerge, which can affect applications that merge untrusted objects, such as parsed JSON request bodies. sanitize-html only ever merged the developer's own configuration, never anything taken from the HTML being sanitized, so it was not exploitable through sanitize-html. Since we needed only a small part of what deepmerge does, we removed the dependency so that these reports no longer appear for sanitize-html users.

Security

  • Since 2.18.0, the fallback markup of a discarded <iframe> was re-sanitized by a recursive call with no limit, one level per nested unclosed <iframe>. A few kilobytes of crafted input could throw RangeError: Maximum call stack size exceeded with the default options, and the nestingLimit option was not enforced across the fallback because each nested call started counting from zero. The fallback of a discarded <iframe> is still sanitized and kept, but only up to eight nested <iframe> elements (deeper fallback is escaped as text, as before 2.18.0), and the current nesting depth now carries into the nested call so nestingLimit applies to the whole output. Only 2.18.0 was affected, and the exception is thrown synchronously, so applications that catch errors from sanitizeHtml only lost the affected request (CWE-674, GHSA-c9rx-x947-fp3h).

    Thanks to hkmj19, JohnBeckley, and amikhailovstiltsoft for reporting the vulnerability.

Commits

Dependabot compatibility score

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

  • @dependabot rebase will rebase this PR
  • @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
  • @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
  • @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
  • @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
  • @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
    You can disable automated security fix PRs for this repo from the Security Alerts page.

Summary by cubic

Updates sanitize-html to 2.18.1, which fixes a stack overflow vulnerability (GHSA-c9rx-x947-fp3h) where crafted nested unclosed <iframe> elements could throw RangeError: Maximum call stack size exceeded. The fallback markup of discarded <iframe> elements is now limited to 8 nested levels, and the nestingLimit option correctly applies across the whole output.

Also removes the deepmerge dependency, which was only used to combine allowedClasses and allowedStyles config; this silences false-positive CVE-2026-93753 reports from security scanners. The lockfile change is limited to the sanitize-html bump, with no other dependency moves.