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CVE

CVE-2026-44990

Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`
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CVE

CVE-2026-44990

Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
C
H
U
9.3
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Related Resources

No items found.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44990.json, https://access.redhat.com/errata/RHSA-2026:36882, https://access.redhat.com/errata/RHSA-2026:36883, https://access.redhat.com/errata/RHSA-2026:40262, https://access.redhat.com/errata/RHSA-2026:41031, https://access.redhat.com/errata/RHSA-2026:41055, https://access.redhat.com/errata/RHSA-2026:41064, https://access.redhat.com/errata/RHSA-2026:41066, https://access.redhat.com/errata/RHSA-2026:42146, https://access.redhat.com/errata/RHSA-2026:42796, https://access.redhat.com/errata/RHSA-2026:43052, https://access.redhat.com/errata/RHSA-2026:46598, https://access.redhat.com/errata/RHSA-2026:46685, https://access.redhat.com/errata/RHSA-2026:46885, https://access.redhat.com/errata/RHSA-2026:46903, https://access.redhat.com/errata/RHSA-2026:47735, https://access.redhat.com/errata/RHSA-2026:47737, https://access.redhat.com/errata/RHSA-2026:48124, https://access.redhat.com/errata/RHSA-2026:51196, https://access.redhat.com/errata/RHSA-2026:51197, https://access.redhat.com/errata/RHSA-2026:51349, https://access.redhat.com/security/cve/CVE-2026-44990, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44990.json, https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643, https://nvd.nist.gov/vuln/detail/CVE-2026-44990, https://bugzilla.redhat.com/show_bug.cgi?id=2488565

Severity

9.3

CVSS Score
0
10

Basic Information

Base CVSS
9.3
EPSS Probability
0.00514%
EPSS Percentile
0.41142%
Introduced Version
0
Fix Available
e9b0ab0849a5dfea0f75335fbdf99b5c6bf9e4b3

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