JLSEC-2025-63

See a problem?
Please try reporting it to the source first.
Source
https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2025/JLSEC-2025-63.md
Import Source
https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-63.json
JSON Data
https://api.osv.dev/v1/vulns/JLSEC-2025-63
Upstream
Published
2025-10-14T15:35:41.198Z
Modified
2026-07-25T18:23:44.484258614Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
An issue was discovered in libexpat before 2.6.3
Details

An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).

Database specific 
{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "database_specific": {
                "status": "Modified"
            },
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2024-45491",
            "published": "2024-08-30T03:15:03.850Z",
            "id": "CVE-2024-45491",
            "imported": "2026-07-17T21:04:10.737Z",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45491",
            "modified": "2026-06-17T07:54:18.673Z"
        }
    ]
}
References

Affected packages

Julia / Expat_jll

Package

Name
Expat_jll
Purl
pkg:julia/Expat_jll?uuid=2e619515-83b5-522b-bb60-26c02a35a201

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.6.4+0

Database specific

source 
"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-63.json"