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        "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "state": "PUBLISHED",
        "assignerShortName": "PSF",
        "dateReserved": "2025-05-09T14:59:53.878Z",
        "datePublished": "2025-05-15T13:29:20.126Z",
        "dateUpdated": "2026-07-31T14:02:21.178Z"
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                            "status": "affected",
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                    "lang": "en",
                    "supportingMedia": [
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                            "type": "text/html",
                            "value": "There is an issue in CPython when using `bytes.decode(\"unicode_escape\", error=\"ignore|replace\")`. If you are not using the \"unicode_escape\" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError."
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                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "attackVector": "LOCAL",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0",
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                            "cweId": "CWE-416",
                            "description": "CWE-416 Use After Free",
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            "references": [
                {
                    "tags": [
                        "issue-tracking"
                    ],
                    "url": "https://github.com/python/cpython/issues/133767"
                },
                {
                    "tags": [
                        "patch"
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                    "url": "https://github.com/python/cpython/pull/129648"
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                {
                    "tags": [
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                    "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/L75IPBBTSCYEF56I2M4KIW353BB3AY74/"
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                {
                    "tags": [
                        "patch"
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                    "url": "https://github.com/python/cpython/commit/69b4387f78f413e8c47572a85b3478c47eba8142"
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                    "url": "https://github.com/python/cpython/commit/ab9893c40609935e0d40a6d2a7307ea51aec598b"
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            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Use-after-free in \"unicode_escape\" decoder with error handler",
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                                "timestamp": "2025-05-15T14:18:44.612125Z",
                                "id": "CVE-2025-4516",
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                                        "Exploitation": "none"
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                    "dateUpdated": "2025-05-15T14:18:50.599Z"
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            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2025/05/16/4"
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                        "url": "http://www.openwall.com/lists/oss-security/2025/05/19/1"
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