Bug 2488565 (CVE-2026-44990)

Summary: CVE-2026-44990 sanitize-html: `sanitize-html`: Stored Cross-Site Scripting via HTML sanitizer bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: anthomas, bdettelb, cmyers, dkeler, dnakabaa, doconnor, ehelms, fdeutsch, ggainey, gparvin, jkoehler, jpasqual, juwatts, kaycoth, kshier, lcouzens, lphiri, mhulan, nmoumoul, oramraz, osousa, pahickey, pcreech, prwatson, rchan, rhaigner, sdawley, smallamp, smullick, stcannon, stirabos, suppawar, teagle, thason, tmalecek, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the `sanitize-html` library. Under its default configuration, an attacker can embed malicious content within a disallowed `xmp` element. This vulnerability allows the attacker to bypass the HTML sanitization process, leading to stored Cross-Site Scripting (XSS). Successful exploitation can result in arbitrary code execution or information disclosure when a user views the affected content.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2492685, 2492686, 2492687, 2492688, 2492690, 2492691, 2492692, 2492694, 2492695, 2492696, 2492697, 2492682, 2492683, 2492684, 2492689, 2492693    
Bug Blocks:    

Description OSIDB Bzimport 2026-06-12 21:02:47 UTC
ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.