CVE-2026-44990 (GCVE-0-2026-44990)

Vulnerability from cvelistv5 – Published: 2026-06-12 20:39 – Updated: 2026-07-27 12:05
VLAI
Title
Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`
Summary
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.
Severity
9.3 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
URL Tags
https://github.com/apostrophecms/apostrophe/secur… x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2026-44990 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2488565 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:41064 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36882 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:42146 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:43052 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:42796 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:41066 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:41031 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:40262 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:41055 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36883 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
apostrophecms sanitize-html Affected: < 2.17.4
Create a notification for this product.
Red Hat multicluster engine for Kubernetes 2.6 Unaffected: 1783351002 , < * (rpm)
    cpe:/a:redhat:multicluster_engine:2.6::el9
 Create a notification for this product.
Red Hat multicluster engine for Kubernetes 2.9 Unaffected: 1783348181 , < * (rpm)
    cpe:/a:redhat:multicluster_engine:2.9::el9
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 Unaffected: 1783350952 , < * (rpm)
    cpe:/a:redhat:acm:2.11::el9
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 Unaffected: 1783451729 , < * (rpm)
    cpe:/a:redhat:acm:2.14::el9
 Create a notification for this product.
Red Hat Red Hat Quay 3.1 Unaffected: 1783750447 , < * (rpm)
    cpe:/a:redhat:quay:3.10::el8
 Create a notification for this product.
Red Hat Red Hat Quay 3.12 Unaffected: 1783751865 , < * (rpm)
Unaffected: 1784353904 , < * (rpm)
    cpe:/a:redhat:quay:3.12::el8
 Create a notification for this product.
Red Hat Red Hat Quay 3.15 Unaffected: 1784351966 , < * (rpm)
    cpe:/a:redhat:quay:3.15::el8
 Create a notification for this product.
Red Hat Red Hat Quay 3.16 Unaffected: 1783955846 , < * (rpm)
    cpe:/a:redhat:quay:3.16::el9
 Create a notification for this product.
Red Hat Red Hat Quay 3.9 Unaffected: 1784125838 , < * (rpm)
    cpe:/a:redhat:quay:3.9::el8
 Create a notification for this product.
Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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Red Hat Red Hat OpenShift Dev Spaces     cpe:/a:redhat:openshift_devspaces:3
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Red Hat Red Hat OpenShift Virtualization 4     cpe:/a:redhat:container_native_virtualization:4
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Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
 Create a notification for this product.
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}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.