{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73494",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-12T19:00:33.735Z",
        "datePublished": "2026-09-14T17:33:49.671Z",
        "dateUpdated": "2026-09-14T20:05:52.181Z"
    },
    "containers": {
        "cna": {
            "title": "blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze's Java wire parser",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-444",
                            "lang": "en",
                            "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/http4s/blaze/security/advisories/GHSA-mhvj-jhpq-885v",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/http4s/blaze/security/advisories/GHSA-mhvj-jhpq-885v"
                },
                {
                    "name": "https://github.com/http4s/blaze/commit/3f7c022e306631b006dcb43a1d7f65c0d1966f17",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/commit/3f7c022e306631b006dcb43a1d7f65c0d1966f17"
                },
                {
                    "name": "https://github.com/http4s/blaze/commit/4eec2007806aa9acfefb00ebb636ddc39a147a96",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/commit/4eec2007806aa9acfefb00ebb636ddc39a147a96"
                },
                {
                    "name": "https://github.com/http4s/blaze/commit/927b67753a78c13c4445dac9307f511f5c4878c3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/commit/927b67753a78c13c4445dac9307f511f5c4878c3"
                },
                {
                    "name": "https://github.com/http4s/blaze/commit/a54bc9cd31758335c7f24e29763622fd03fcf734",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/commit/a54bc9cd31758335c7f24e29763622fd03fcf734"
                },
                {
                    "name": "https://github.com/http4s/blaze/commit/c47d9675f87603f11b32a11d503626bdf9be5c7a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/commit/c47d9675f87603f11b32a11d503626bdf9be5c7a"
                },
                {
                    "name": "https://github.com/http4s/blaze/commit/e871ebb1d27f50c98fd56988526ce42d0fee74d6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/commit/e871ebb1d27f50c98fd56988526ce42d0fee74d6"
                },
                {
                    "name": "https://github.com/http4s/blaze/releases/tag/v0.23.18",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/releases/tag/v0.23.18"
                },
                {
                    "name": "https://github.com/http4s/blaze/releases/tag/v1.0.0-M42",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/http4s/blaze/releases/tag/v1.0.0-M42"
                }
            ],
            "affected": [
                {
                    "vendor": "http4s",
                    "product": "blaze",
                    "versions": [
                        {
                            "version": "< 0.23.18",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.0.0-M1, < 1.0.0-M42",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "org.http4s",
                    "product": "blaze-http_2.13",
                    "versions": [
                        {
                            "version": "< 0.23.18",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.0.0-M1, < 1.0.0-M42",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "org.http4s",
                    "product": "blaze-http_3",
                    "versions": [
                        {
                            "version": "< 0.23.18",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.0.0-M1, < 1.0.0-M42",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "org.http4s",
                    "product": "http4s-blaze-server_2.13",
                    "versions": [
                        {
                            "version": "< 0.23.18",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-14T17:33:49.671Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. Prior to 0.23.18 and from 1.0.0-M1 until 1.0.0-M42, five HTTP/1.1 conformance laxities in the hand-written Java parser under http/src/main/java/org/http4s/blaze/http/parser/ can cause blaze to derive a different request boundary than a stricter fronting intermediary. A default BlazeServerBuilder accepts invalid or valueless header field names that violate tchar syntax, obsolete folded field lines (obs-fold), unsupported Transfer-Encoding values, duplicate Content-Length fields, and requests containing both Transfer-Encoding and Content-Length. If a lenient or legacy proxy forwards the malformed bytes but interprets them differently, the disagreement can permit front-end authorization bypass, response-queue poisoning on pooled backend connections, or cache poisoning. Exploitation requires a pair of disagreeing parsers; no non-default blaze configuration is required. The affected checks are enforced in BodyAndHeaderParser and Http1ServerParser. This issue is fixed in versions 0.23.18 and 1.0.0-M42."
                }
            ],
            "source": {
                "advisory": "GHSA-mhvj-jhpq-885v",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-14T19:21:20.842876Z",
                                "id": "CVE-2026-73494",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-14T20:05:52.181Z"
                }
            }
        ]
    }
}