{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55612",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-02T17:03:23.416603Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-02T18:09:13.455Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "uhttpd",
          "vendor": "openwrt",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= b7c85a2819b3869279a669d5681f574824589c6c, \u003c b78f518478794e16ba3568fc1258e40bf3e8eb3b"
            },
            {
              "status": "affected",
              "version": "\u003e= b7c85a2819b3869279a669d5681f574824589c6c, \u003c 34460b8211d676ef1b9f40d6b775c5e112933690"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "uhttpd is a small HTTP server. In unpatched repository snapshots, `client_poll_post_data()` in `client.c` consumes an invalid chunk-length line, such as a size exceeding INT_MAX, then clears `r-\u003econtent_length` and `r-\u003etransfer_chunked` without draining the remaining body or setting `request.connection_close`. The completion check treats the chunked POST as finished and the keep-alive parser returns to `CLIENT_STATE_INIT`. Attacker-controlled body bytes aligned as a complete HTTP request are then parsed and processed as another request on the same connection, causing HTTP request smuggling and request-boundary desynchronization. Commits b78f518478794e16ba3568fc1258e40bf3e8eb3b and 34460b8211d676ef1b9f40d6b775c5e112933690 patch the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/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": "2026-10-30T22:00:19.756Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/openwrt/uhttpd/security/advisories/GHSA-p55c-rmhc-qfm5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/openwrt/uhttpd/security/advisories/GHSA-p55c-rmhc-qfm5"
        },
        {
          "name": "https://github.com/openwrt/uhttpd/commit/34460b8211d676ef1b9f40d6b775c5e112933690",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openwrt/uhttpd/commit/34460b8211d676ef1b9f40d6b775c5e112933690"
        },
        {
          "name": "https://github.com/openwrt/uhttpd/commit/b78f518478794e16ba3568fc1258e40bf3e8eb3b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openwrt/uhttpd/commit/b78f518478794e16ba3568fc1258e40bf3e8eb3b"
        }
      ],
      "source": {
        "advisory": "GHSA-p55c-rmhc-qfm5",
        "discovery": "UNKNOWN"
      },
      "title": "uhttpd vulnerable to HTTP request smuggling via invalid chunk-length state reset"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55612",
    "datePublished": "2026-10-30T22:00:19.756Z",
    "dateReserved": "2026-06-16T23:31:22.445Z",
    "dateUpdated": "2026-11-02T18:09:13.455Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-55612\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-11-02T17:03:23.416603Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-11-02T17:03:24.177Z\"}}], \"cna\": {\"title\": \"uhttpd vulnerable to HTTP request smuggling via invalid chunk-length state reset\", \"source\": {\"advisory\": \"GHSA-p55c-rmhc-qfm5\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 3.7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"openwrt\", \"product\": \"uhttpd\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= b7c85a2819b3869279a669d5681f574824589c6c, \u003c b78f518478794e16ba3568fc1258e40bf3e8eb3b\"}, {\"status\": \"affected\", \"version\": \"\u003e= b7c85a2819b3869279a669d5681f574824589c6c, \u003c 34460b8211d676ef1b9f40d6b775c5e112933690\"}]}], \"references\": [{\"url\": \"https://github.com/openwrt/uhttpd/security/advisories/GHSA-p55c-rmhc-qfm5\", \"name\": \"https://github.com/openwrt/uhttpd/security/advisories/GHSA-p55c-rmhc-qfm5\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/openwrt/uhttpd/commit/34460b8211d676ef1b9f40d6b775c5e112933690\", \"name\": \"https://github.com/openwrt/uhttpd/commit/34460b8211d676ef1b9f40d6b775c5e112933690\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/openwrt/uhttpd/commit/b78f518478794e16ba3568fc1258e40bf3e8eb3b\", \"name\": \"https://github.com/openwrt/uhttpd/commit/b78f518478794e16ba3568fc1258e40bf3e8eb3b\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"uhttpd is a small HTTP server. In unpatched repository snapshots, `client_poll_post_data()` in `client.c` consumes an invalid chunk-length line, such as a size exceeding INT_MAX, then clears `r-\u003econtent_length` and `r-\u003etransfer_chunked` without draining the remaining body or setting `request.connection_close`. The completion check treats the chunked POST as finished and the keep-alive parser returns to `CLIENT_STATE_INIT`. Attacker-controlled body bytes aligned as a complete HTTP request are then parsed and processed as another request on the same connection, causing HTTP request smuggling and request-boundary desynchronization. Commits b78f518478794e16ba3568fc1258e40bf3e8eb3b and 34460b8211d676ef1b9f40d6b775c5e112933690 patch the issue.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-444\", \"description\": \"CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-10-30T22:00:19.756Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-55612\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-11-02T18:09:13.455Z\", \"dateReserved\": \"2026-06-16T23:31:22.445Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-10-30T22:00:19.756Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}