CVE-2026-126207
- Source
- https://cve.org/CVERecord?id=CVE-2026-126207
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126207.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-126207
- Aliases
- Downstream
- Published
- 2026-11-12T20:53:55Z
- Modified
- 2026-11-13T10:45:57Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N CVSS Calculator
- Summary
- Loofah: CSS url() sanitization bypass via escaped parentheses
- Details
-
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::HTML5::Scrub.scrub_css checks only the first parse of a style attribute, then rebuilds CSS with identifier escapes decoded so escaped parentheses, property names, comments, or quotes can become a live url() without a second safety check. An attacker can use list-style to make a viewer's browser request an attacker-chosen URL when content renders, or cursor to make the request on hover. The request can disclose the viewer's IP address, user agent, access timing, and access to internal-network hosts, but no script survives sanitization and the attacker cannot read the response. This issue is fixed in version 2.25.3.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-180", "CWE-184" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126207.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126207.json
- https://github.com/flavorjones/loofah/commit/b198a36e44c9c5408163ac50787825e8ca0b166b
- https://github.com/flavorjones/loofah/pull/324
- https://github.com/flavorjones/loofah/releases/tag/v2.25.3
- https://github.com/flavorjones/loofah/security/advisories/GHSA-m3x9-938q-5767
- https://nvd.nist.gov/vuln/detail/CVE-2026-126207
Affected packages
Git / github.com/flavorjones/loofah
Affected ranges
- Type
- GIT
- Repo
- https://github.com/flavorjones/loofah
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "2.25.3" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "b198a36e44c9c5408163ac50787825e8ca0b166b" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v2.25.3", "range": [ { "fixed": "bbe007e52e8aeaa520b3e515235d467f5b1416e6" } ], "source": "REFERENCES_TAG" } ] }