CVE-2026-73492
published 2026-08-12CVE-2026-73492: Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2…
PriorityP413low2.3CVSS 4.0
AVNACHATNPRLUINVCNVINVANSCLSILSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.39%
32.5th percentile
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as :, ,
, or . CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| 3scale-amp2 | system-rhel8 | — | — |
| 3scale-amp2 | system-rhel9 | — | — |
| 3scale-amp2 | zync-rhel9 | — | — |
| flavorjones | loofah | — | — |
CVSS provenance
nvdv4.02.3LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat2.3LOW
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Red Hat
loofah: Loofah: Arbitrary code execution due to URI scheme bypass
vendor_redhat·2026-08-12·CVSS 2.3
CVE-2026-73492 [LOW] CWE-76 loofah: Loofah: Arbitrary code execution due to URI scheme bypass
loofah: Loofah: Arbitrary code execution due to URI scheme bypass
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as :, ,
, or . CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2.
A flaw was found in Loofah, a libra
VulDB
flavorjones Loofah up to 2.25.1 HTML5 Scrub Scrub.allowed_uri HTML injection
vuldb·2026-08-12·CVSS 2.3
CVE-2026-73492 [LOW] flavorjones Loofah up to 2.25.1 HTML5 Scrub Scrub.allowed_uri HTML injection
A vulnerability classified as problematic has been found in flavorjones Loofah up to 2.25.1. The impacted element is the function Loofah::HTML5::Scrub.allowed_uri of the component HTML5 Scrub. The manipulation leads to HTML injection.
This vulnerability is uniquely identified as CVE-2026-73492. The attack is possible to be carried out remotely. No exploit exists.
It is recommended to upgrade the affected component.
No detection rules found.
No public exploits indexed.
2026-08-12
Published