{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73494",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T19:21:20.842876Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-14T20:05:52.181Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "blaze",
          "vendor": "http4s",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.23.18"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.0.0-M1, \u003c 1.0.0-M42"
            }
          ]
        },
        {
          "product": "blaze-http_2.13",
          "vendor": "org.http4s",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.23.18"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.0.0-M1, \u003c 1.0.0-M42"
            }
          ]
        },
        {
          "product": "blaze-http_3",
          "vendor": "org.http4s",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.23.18"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.0.0-M1, \u003c 1.0.0-M42"
            }
          ]
        },
        {
          "product": "http4s-blaze-server_2.13",
          "vendor": "org.http4s",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.23.18"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T17:33:49.671Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "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"
        }
      ],
      "source": {
        "advisory": "GHSA-mhvj-jhpq-885v",
        "discovery": "UNKNOWN"
      },
      "title": "blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze\u0027s Java wire parser"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-73494",
    "datePublished": "2026-09-14T17:33:49.671Z",
    "dateReserved": "2026-08-12T19:00:33.735Z",
    "dateUpdated": "2026-09-14T20:05:52.181Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}