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        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-08-19T21:47:08.936Z",
        "datePublished": "2026-09-29T12:45:19.797Z",
        "dateUpdated": "2026-10-02T12:07:30.652Z"
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                "dateUpdated": "2026-09-29T12:45:19.797Z"
            },
            "title": "PyPy pyexpat ExternalEntityParserCreate Use-After-Free",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption."
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            "problemTypes": [
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                            "lang": "en",
                            "cweId": "CWE-416",
                            "description": "Use After Free",
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                    ]
                }
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                    "vendor": "PyPy",
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                            "version": "0",
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                        "subConfidentialityImpact": "NONE",
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                        "exploitMaturity": "NOT_DEFINED",
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                        "valueDensity": "NOT_DEFINED",
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                    "url": "https://doc.pypy.org/release-v8.0.0.html",
                    "name": "Release Notes",
                    "tags": [
                        "release-notes"
                    ]
                },
                {
                    "url": "https://github.com/pypy/pypy/releases/tag/release-pypy3.12-v8.0.0",
                    "name": "3.12 Release Tag",
                    "tags": [
                        "patch"
                    ]
                },
                {
                    "url": "https://github.com/pypy/pypy/releases/tag/release-pypy3.11-v8.0.0",
                    "name": "3.11 Release Tag",
                    "tags": [
                        "patch"
                    ]
                },
                {
                    "url": "https://www.vulncheck.com/advisories/pypy-pyexpat-externalentityparsercreate-use-after-free",
                    "tags": [
                        "third-party-advisory"
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Fabian Wahle (Hap Security)",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "VulnCheck",
                    "type": "coordinator"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "vulncheck"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-02T12:07:14.237053Z",
                                "id": "CVE-2026-76875",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                        "Automatable": "yes"
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                                        "Technical Impact": "partial"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "dateUpdated": "2026-10-02T12:07:30.652Z"
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}