# CVE-2026-126208: Loofah: SVG `<textPath>` and `<mpath>` bypass local-reference restriction

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.3, Loofah's SVG_ALLOW_LOCAL_HREF safelist lists textPath with lowercase spelling that does not match the HTML5 parser's element name and omits mpath, so external href and xlink:href values on those elements survive sanitization. Firefox fetches the attacker-chosen URL when a viewer renders the content, which can disclose the viewer's IP address, user agent, referrer, and access to hosts routable only from the viewer's network. Chrome and WebKit do not fetch these references, and the impact is a network request rather than script execution. The rails-html-sanitizer PermitScrubber reuses the affected safelist when SVG elements are permitted. This issue is fixed in version 2.25.3.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- flavorjones / loofah: < 2.25.3 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-178, CWE-184

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/flavorjones/loofah/security/advisories/GHSA-345x-3rq2-jfrm (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/flavorjones/loofah/pull/324 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/flavorjones/loofah/commit/cdd6ff7fb51998eb181bd2da925ddbcfcc8a3b96 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/flavorjones/loofah/releases/tag/v2.25.3 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-126208; retrieved 2026-11-12; source updated 2026-11-12

Revision: 2c52eac4486dc914e8e4e8f907711e4070d33b7527026178f4d4d299fb3e7a6b

Canonical: https://y2.dev/cve/CVE-2026-126208

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