CVE-2026-84371

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Source
https://cve.org/CVERecord?id=CVE-2026-84371
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84371.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-84371
Aliases
Downstream
CGA (11)
CLSA (1)
MINI (5)
Published
2026-09-01T20:51:10Z
Modified
2026-09-11T03:31:00Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
ApostropheCMS: Stored XSS via SVG SMIL URI-list scheme-policy bypass
Details

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From version 1.9.0 until version 2.17.7, packages/sanitize-html/index.js validates an animation value attribute as one flat URL and does not recognize that attributeName selecting href or xlink:href gives the sibling values, from, to, or by attribute SVG SMIL URL semantics. In configurations that allow the animate, animateColor, animateMotion, animateTransform, or set elements, a values list can begin with a safe fragment and contain a later executable destination that survives allowedSchemesAppliedToAttributes checking. When the sanitized SVG is rendered, the browser can copy that later destination into the live link, and a victim who activates the link can execute script in the application's origin. This issue is fixed in version 2.17.7.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84371.json"
}
References

Affected packages

Git / github.com/apostrophecms/apostrophe

Affected ranges

Type
GIT
Repo
https://github.com/apostrophecms/apostrophe
Events
Introduced
c2e454f69e303c35fc6faae9b86332c2467bc3e2
Fixed
1135516a1a4a8f9638641c460488a43d8af20081
Fixed
38ff1106c8176b16c2da9872acd9b449adcbb949
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "1.9.0"
        },
        {
            "fixed":  "2.17.7"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84371.json"