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        "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "state": "PUBLISHED",
        "assignerShortName": "PSF",
        "dateReserved": "2026-01-12T16:07:56.781Z",
        "datePublished": "2026-01-20T21:26:15.274Z",
        "dateUpdated": "2026-03-03T14:43:30.596Z"
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            "credits": [
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Omar M. Hasan"
                }
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                    "lang": "en",
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                            "base64": false,
                            "type": "text/html",
                            "value": "User-controlled header names and values containing newlines can allow injecting HTTP headers."
                        }
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                    "value": "User-controlled header names and values containing newlines can allow injecting HTTP headers."
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            ],
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                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
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                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM",
                        "exploitMaturity": "NOT_DEFINED",
                        "privilegesRequired": "HIGH",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0",
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                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
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                            "lang": "en",
                            "value": "GENERAL"
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                {
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                            "cweId": "CWE-74",
                            "description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')",
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                            "type": "CWE"
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                    "tags": [
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                    ],
                    "url": "https://github.com/python/cpython/pull/143917"
                },
                {
                    "tags": [
                        "issue-tracking"
                    ],
                    "url": "https://github.com/python/cpython/issues/143916"
                },
                {
                    "tags": [
                        "vendor-advisory"
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                    "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/"
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                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "wsgiref.headers.Headers allows header newline injection",
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            {
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                                "timestamp": "2026-01-21T15:40:22.223517Z",
                                "id": "CVE-2026-0865",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
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                                "role": "CISA Coordinator",
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                "title": "CISA ADP Vulnrichment",
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