JLSEC-2026-1236

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Source
https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1236.md
Import Source
https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1236.json
JSON Data
https://api.osv.dev/v1/vulns/JLSEC-2026-1236
Upstream
Published
2026-08-09T01:27:54.135Z
Modified
2026-08-09T01:30:04.128474116Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
[none]
Details

libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.

Database specific 
{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "database_specific": {
                "status": "Analyzed"
            },
            "id": "CVE-2026-56412",
            "published": "2026-06-21T17:16:44.657Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56412",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56412",
            "modified": "2026-06-23T15:31:30.853Z",
            "imported": "2026-08-09T01:17:12.028Z"
        }
    ]
}
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
2.8.2+0

Database specific

source 
"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1236.json"