What is CVE-2026-73490?

CVE-2026-73490 is a medium-severity vulnerability in Flavorjones Loofah, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-08-12.

How severe is CVE-2026-73490?

Medium severity. CVSS v3 base score is 4.7 out of 10.

XSS in Flavorjones Loofah

CVE-2026-73490

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…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Flavorjones Loofah — versions < 2.25.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-73490?: CVE-2026-73490 is a medium-severity vulnerability in Flavorjones Loofah, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-08-12.
How severe is CVE-2026-73490?: Medium severity. CVSS v3 base score is 4.7 out of 10.