{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-34715",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-03-30T18:41:20.752Z",
        "datePublished": "2026-04-02T17:57:00.501Z",
        "dateUpdated": "2026-04-03T16:00:41.121Z"
    },
    "containers": {
        "cna": {
            "title": "ewe Has Improper Neutralization of CRLF Sequences in HTTP Headers (HTTP Request/Response Splitting)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-113",
                            "lang": "en",
                            "description": "CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/vshakitskiy/ewe/security/advisories/GHSA-x2w3-23jr-hrpf",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/vshakitskiy/ewe/security/advisories/GHSA-x2w3-23jr-hrpf"
                },
                {
                    "name": "https://github.com/vshakitskiy/ewe/commit/ce4ff214d32626a10fda9398dc94a2d720e17446",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vshakitskiy/ewe/commit/ce4ff214d32626a10fda9398dc94a2d720e17446"
                },
                {
                    "name": "https://github.com/vshakitskiy/ewe/releases/tag/v3.0.6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vshakitskiy/ewe/releases/tag/v3.0.6"
                }
            ],
            "affected": [
                {
                    "vendor": "vshakitskiy",
                    "product": "ewe",
                    "versions": [
                        {
                            "version": "< 3.0.6",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-02T17:57:00.501Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "ewe is a Gleam web server. Prior to version 3.0.6, the encode_headers function in src/ewe/internal/encoder.gleam directly interpolates response header keys and values into raw HTTP bytes without validating or stripping CRLF (\\r\\n) sequences. An application that passes user-controlled data into response headers (e.g., setting a Location redirect header from a request parameter) allows an attacker to inject arbitrary HTTP response content, leading to response splitting, cache poisoning, and possible cross-site scripting. Notably, ewe does validate CRLF in incoming request headers via validate_field_value() in the HTTP/1.1 parser — but provides no equivalent protection for outgoing response headers in the encoder. This issue has been patched in version 3.0.6."
                }
            ],
            "source": {
                "advisory": "GHSA-x2w3-23jr-hrpf",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/vshakitskiy/ewe/security/advisories/GHSA-x2w3-23jr-hrpf",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-03T16:00:11.591060Z",
                                "id": "CVE-2026-34715",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-03T16:00:41.121Z"
                }
            }
        ]
    }
}