never-ending loop via server response omission

{
  "id": "f57ead8fd5dbd7bf4c8b06408fd62ff0ecb0cb523bc65309e5dee0fbac58e033",
  "url": "https://osv.dev/vulnerability/CURL-CVE-2026-92387",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "never-ending loop via server response omission",
    "summary": "By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-handle.",
    "evidence": "osv:CURL-CVE-2026-92387",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CURL-CVE-2026-92387",
      "aliases": [
        "CURL-CVE-2026-92387",
        "CVE-2026-92387"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "8.10.0"
                },
                {
                  "fixed": "8.14.3"
                },
                {
                  "introduced": "8.15.0"
                },
                {
                  "fixed": "8.16.2"
                },
                {
                  "introduced": "8.17.0"
                },
                {
                  "fixed": "8.20.2"
                },
                {
                  "introduced": "8.21.0"
                },
                {
                  "fixed": "8.23.0"
                }
              ]
            },
            {
              "repo": "https://github.com/curl/curl.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a5598b6fcb9ec6b57a7770939a0ffb004456f333"
                },
                {
                  "fixed": "753735af87f5c30cb6f60a70342f8bc4bc5fd5db"
                }
              ]
            }
          ],
          "versions": [
            "8.22.0",
            "8.21.0",
            "8.20.0",
            "8.19.0",
            "8.18.0",
            "8.17.0",
            "8.16.0",
            "8.15.0",
            "8.14.1",
            "8.14.0",
            "8.13.0",
            "8.12.1",
            "8.12.0",
            "8.11.1",
            "8.11.0",
            "8.10.1",
            "8.10.0",
            "curl-8_22_0",
            "rc-8_22_0-3",
            "rc-8_22_0-2",
            "rc-8_22_0-1",
            "curl-8_21_0",
            "rc-8_21_0-3",
            "rc-8_21_0-2",
            "rc-8_21_0-1",
            "curl-8_20_0",
            "rc-8_20_0-3",
            "rc-8_20_0-2",
            "rc-8_20_0-1",
            "curl-8_19_0",
            "rc-8_19_0-3",
            "rc-8_19_0-2",
            "rc-8_19_0-1",
            "curl-8_18_0",
            "rc-8_18_0-3",
            "rc-8_18_0-2",
            "rc-8_18_0-1",
            "curl-8_17_0",
            "curl-8_16_0",
            "curl-8_15_0",
            "curl-8_14_1",
            "curl-8_14_0",
            "curl-8_13_0",
            "curl-8_12_1",
            "curl-8_12_0",
            "curl-8_11_1",
            "curl-8_11_0",
            "curl-8_10_1",
            "curl-8_10_0"
          ],
          "database_specific": {
            "source": "https://curl.se/docs/CURL-CVE-2026-92387.json",
            "vanir_signatures": [
              {
                "id": "CURL-CVE-2026-92387-9e19c6ef",
                "digest": {
                  "length": 1871,
                  "function_hash": "93901083509750780320854330073705313769"
                },
                "source": "https://github.com/curl/curl.git/commit/753735af87f5c30cb6f60a70342f8bc4bc5fd5db",
                "target": {
                  "file": "lib/pingpong.c",
                  "function": "Curl_pp_readresp"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CURL-CVE-2026-92387-d9a0166d",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "169611561849356060343441831226630819355",
                    "118885270056145985855100001206482147825",
                    "176955460389398393301350962022688380839",
                    "152937119064837621797053374591284717795",
                    "325734690655925500675941255108677679434",
                    "255149461833275457707710178384217140142",
                    "309957915722649277253297686296249982562",
                    "228368724181808616248373136079572392417"
                  ]
                },
                "source": "https://github.com/curl/curl.git/commit/753735af87f5c30cb6f60a70342f8bc4bc5fd5db",
                "target": {
                  "file": "lib/pingpong.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-27T01:28:37Z"
          }
        }
      ],
      "modified": "2026-10-27T01:28:37.454208090Z",
      "provider": "osv",
      "references": [],
      "provider_metadata": {
        "CWE": {
          "id": "CWE-835",
          "desc": "Loop with Unreachable Exit Condition ('Infinite Loop')"
        },
        "URL": "https://curl.se/docs/CVE-2026-92387.json",
        "www": "https://curl.se/docs/CVE-2026-92387.html",
        "issue": "https://hackerone.com/reports/4022003",
        "affects": "both",
        "package": "curl",
        "severity": "Low",
        "last_affected": "8.22.0"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-92387",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 459162,
  "published_at": "2026-10-14T08:00:00+00:00"
}