CVE-2026-73490Loofah: SVG `href` attribute bypasses local-reference restriction
- 4.7MediumCVSS base score
- 0.30%Exploitation in 30 daysEPSS · top 78% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.
Timeline
ID reserved
By GitHub_M
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium4.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | Medium4.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.30% · top 78% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Affected products
- affected < 2.25.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- RubyGemsloofahGHSA-9wjq-cp2p-hrgf (opens in a new tab)
References
References4
- https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf (opens in a new tab)x_refsource_CONFIRM
- https://github.com/flavorjones/loofah/pull/308 (opens in a new tab)x_refsource_MISC
- https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9 (opens in a new tab)x_refsource_MISC
- https://github.com/flavorjones/loofah/releases/tag/v2.25.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-57626 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-9wjq-cp2p-hrgf (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-73490)Record last updated .