# html\_sanitize\_ex (Hex) vulnerabilities

6 known vulnerabilities (2 high, 1 medium, 3 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://hex.pm/packages/html_sanitize_ex

## Advisories (6)

### [CVE-2026-68750](https://cve.now/CVE-2026-68750): Quadratic sibling re-flattening in the html\_sanitize\_ex traversal engine allows CPU-exhaustion denial of service

- Severity: High 8.2
- Published: Aug 6, 2026
- Affected: from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3; from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3.

### [CVE-2026-68749](https://cve.now/CVE-2026-68749): Quadratic regex backtracking in the html\_sanitize\_ex CSS scrubber allows CPU-exhaustion denial of service

- Severity: High 8.2
- Published: Aug 6, 2026
- Affected: from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3; from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3.

### [CVE-2026-68747](https://cve.now/CVE-2026-68747): CSS sanitizer allowlist bypass in html\_sanitize\_ex via non-declaration input

- Severity: Low 2.3
- Published: Aug 6, 2026
- Affected: from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.4; from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.4.

### [CVE-2026-66829](https://cve.now/CVE-2026-66829): html\_sanitize\_ex HTML5 scrubber keeps attacker-supplied meta refresh, allowing forced cross-origin redirection

- Severity: Low 2.3
- Published: Aug 6, 2026
- Affected: from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3; from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3.

### [CVE-2026-66370](https://cve.now/CVE-2026-66370): html\_sanitize\_ex HTML5 scrubber keeps attacker-supplied form-association attributes, allowing form hijacking

- Severity: Medium 4.8
- Published: Aug 6, 2026
- Affected: from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3; from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3.

### [CVE-2026-66843](https://cve.now/CVE-2026-66843): html\_sanitize\_ex HTML5 scrubber keeps attacker-supplied \`\<object\>\` elements, allowing untrusted content embedding

- Severity: Low 2.3
- Published: Aug 6, 2026
- Affected: from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3; from 0.3.1, fixed in 1.4.5; from 1.5.0-rc.0, fixed in 1.5.3.

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