CVE-2026-49978

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Source
https://cve.org/CVERecord?id=CVE-2026-49978
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49978.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49978
Aliases
Downstream
Related
Published
2026-07-14T20:02:46.263Z
Modified
2026-08-05T03:32:37.526363447Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator
Summary
DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content
Details

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49978.json",
    "cna_assigner": "GitHub_M",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "3.4.6"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cwe_ids": [
        "CWE-79"
    ]
}
References

Affected packages

Git / github.com/cure53/dompurify

Affected ranges

Type
GIT
Repo
https://github.com/cure53/dompurify
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ca30f070c360df162a3e3848e80e6fd3c9e74bff
Database specific 
{
    "source": "REFERENCES"
}

Affected versions

0.*
0.1
0.3
0.4
0.4.2
0.4.3
0.4.4
0.4.5
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.7.0
0.7.1
0.7.2
0.7.3
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
0.9.0
1.*
1.0.0
1.0.1
1.0.10
1.0.11
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6
1.0.7
1.0.8
1.0.9
2.*
2.0.0
2.0.1
2.0.10
2.0.11
2.0.12
2.0.13
2.0.14
2.0.15
2.0.16
2.0.17
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.8
2.0.9
2.1.0
2.1.1
2.2.0
2.2.2
2.2.3
2.2.4
2.2.6
2.2.7
2.2.8
2.2.9
2.3.0
2.3.1
2.3.10
2.3.11
2.3.12
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.8
2.3.9
2.4.0
2.4.1
2.4.2
2.4.3
3.*
3.0.4
3.1.3
3.2.3
3.3.3
3.4.0
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
v0.*
v0.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49978.json"