{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-44990: Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-44990","status":"final","version":"1","initial_release_date":"2026-06-12T20:39:47.065Z","current_release_date":"2026-06-15T13:04:56.814Z","revision_history":[{"date":"2026-06-12T20:39:47.065Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-44990 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-44990"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-44990"},{"category":"external","summary":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643","url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643"}]},"product_tree":{"branches":[{"category":"vendor","name":"apostrophecms","branches":[{"category":"product_name","name":"sanitize-html","branches":[{"category":"product_version","name":"< 2.17.4","product":{"name":"apostrophecms sanitize-html < 2.17.4","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:apostrophecms:sanitize-html:\\<_2.17.4:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-44990","title":"Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","baseScore":9.3,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}