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High

httpd applies no timeout while receiving a request body, parking a worker on a stalled client

Type: advisorySources: OSV

Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial of service by sending valid request headers with a large Content-Length and then stalling before the body is complete. httpd_request_handler:handle_info/2 cancels the request timeout as soon as a parse step succeeds, which includes the headers, and the clause that handles a decoder asking for more data re-arms the socket with {active, once} without setting any further timer. httpd_request:whole_body/2 returns such a continuation whenever the bytes received are fewer than the announced Content-Length, so a well-formed request that stops mid-body leaves the worker waiting indefinitely. The periodic byte-rate check that would reclaim it is armed only when minimum_bytes_per_second is configured, which it is not by default. Repeating this across connections occupies every worker permitted by max_clients and denies service to legitimate clients at negligible bandwidth cost. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-71380
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 19:03 UTC · Revision 1

Source evidence

httpd applies no timeout while receiving a request body, parking a worker on a stalled client

core-osv · Original source

Published 1 Sept 2026, 14:35 UTC

Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial of service by sending valid request headers with a large Content-Length and then stalling before the body is complete. httpd_request_handler:handle_info/2 cancels the request timeout as soon as a parse step succeeds, which includes the headers, and the clause that handles a decoder asking for more data re-arms the socket with {active, once} without setting any further timer. httpd_request:whole_body/2 returns such a continuation whenever the bytes received are fewer than the announced Content-Length, so a well-formed request that stops mid-body leaves the worker waiting indefinitely. The periodic byte-rate check that would reclaim it is armed only when minimum_bytes_per_second is configured, which it is not by default. Repeating this across connections occupies every worker permitted by max_clients and denies service to legitimate clients at negligible bandwidth cost. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

osv:CVE-2026-71380
Complete source record
{
  "id": "33b237914ae117651b640bde11f399a6837d0b973c8e160517cde4c5a976a4c3",
  "url": "https://osv.dev/vulnerability/CVE-2026-71380",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "httpd applies no timeout while receiving a request body, parking a worker on a stalled client",
    "summary": "Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial of service by sending valid request headers with a large Content-Length and then stalling before the body is complete. httpd_request_handler:handle_info/2 cancels the request timeout as soon as a parse step succeeds, which includes the headers, and the clause that handles a decoder asking for more data re-arms the socket with {active, once} without setting any further timer. httpd_request:whole_body/2 returns such a continuation whenever the bytes received are fewer than the announced Content-Length, so a well-formed request that stops mid-body leaves the worker waiting indefinitely. The periodic byte-rate check that would reclaim it is armed only when minimum_bytes_per_second is configured, which it is not by default. Repeating this across connections occupies every worker permitted by max_clients and denies service to legitimate clients at negligible bandwidth cost. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.",
    "evidence": "osv:CVE-2026-71380",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-71380",
      "aliases": [
        "CVE-2026-71380",
        "EEF-CVE-2026-71380",
        "GHSA-5vp4-58hc-h8cc"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/erlang/otp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "84adefa331c4159d432d22840663c38f155cd4c1"
                },
                {
                  "fixed": "81b453aac5a006bb8d26405f2bc3cf24e9d7733c"
                },
                {
                  "introduced": "07b8f441ca711f9812fad9e9115bab3c3aa92f79"
                },
                {
                  "fixed": "79157f447019730504f6f6c43c9b1d1cfa1d4192"
                },
                {
                  "introduced": "9e6f6742c4d9e9915ee8af0dcb7d97cf1f836116"
                },
                {
                  "fixed": "e7252384d42f124c07bec5c79eebd7ea9cdd5100"
                },
                {
                  "introduced": "550d7b7898706c7822362c42e7b93120c1d1f29a"
                },
                {
                  "fixed": "e07fd07837e5aa845657f5fa340637121e451d47"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "84adefa331c4159d432d22840663c38f155cd4c1"
                      },
                      {
                        "fixed": "81b453aac5a006bb8d26405f2bc3cf24e9d7733c"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "17.0"
                      },
                      {
                        "fixed": "27.3.4.17"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "28.0"
                      },
                      {
                        "fixed": "28.5.0.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "29.0"
                      },
                      {
                        "fixed": "29.0.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "81b453aac5a006bb8d26405f2bc3cf24e9d7733c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "patch-base-27",
            "OTP-27.3.4",
            "patch-base-28",
            "OTP-28.5",
            "OTP-29.0",
            "OTP-29.0.5",
            "OTP-27.3.4.9",
            "OTP-27.3.4.10",
            "OTP-29.0.2",
            "OTP-28.5.0.2",
            "OTP-28.5.0.5",
            "OTP-27.3.4.14",
            "OTP-27.3.4.16",
            "OTP-29.0.3",
            "OTP-27.3.4.15",
            "OTP-28.5.0.4",
            "OTP-29.0.4",
            "OTP-28.5.0.3",
            "OTP-27.3.4.13",
            "OTP-28.4",
            "OTP-27.3.4.12",
            "OTP-28.5.0.1",
            "OTP-29.0.1",
            "OTP-27.0",
            "OTP-27.3.4.11",
            "OTP-28.0",
            "OTP-27.3.4.8",
            "OTP-27.3.4.6",
            "OTP-27.3.4.7",
            "OTP-27.3",
            "OTP-27.3.4.5",
            "OTP-27.3.4.4",
            "OTP-28.1",
            "OTP-27.3.4.3",
            "OTP-27.3.3",
            "OTP-27.3.4.2",
            "OTP-26.0",
            "OTP-25.0",
            "OTP-27.3.4.1",
            "OTP-27.3.2",
            "OTP-27.2",
            "OTP-27.3.1",
            "OTP-27.1",
            "OTP-27.0-rc3",
            "OTP-27.0-rc2",
            "OTP-27.0-rc1",
            "OTP-24.0",
            "OTP-26.0-rc3",
            "OTP-26.0-rc2",
            "OTP-26.0-rc1",
            "OTP-23.0",
            "OTP-21.0",
            "OTP-25.0-rc3",
            "OTP-25.0-rc2",
            "OTP-25.0-rc1",
            "OTP-22.0",
            "OTP-24.0-rc3",
            "OTP-24.0-rc2",
            "OTP-24.0-rc1",
            "OTP-23.0-rc3",
            "OTP-23.0-rc2",
            "OTP-23.0-rc1",
            "OTP-20.0",
            "OTP-22.0-rc3",
            "OTP-22.0-rc2",
            "OTP-22.0-rc1",
            "OTP-19.0",
            "OTP-21.0-rc2",
            "OTP-18.0",
            "OTP-21.0-rc1",
            "OTP-17.0",
            "OTP-20.0-rc2",
            "OTP-20.0-rc1",
            "OTP-19.0-rc2",
            "OTP-19.0-rc1",
            "OTP-18.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71380.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.697144764Z",
      "provider": "osv",
      "references": [
        "https://cna.erlef.org/cves/CVE-2026-71380.html",
        "https://github.com",
        "https://osv.dev/vulnerability/EEF-CVE-2026-71380",
        "https://www.erlang.org/doc/system/versions.html#order-of-versions",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71380.json",
        "https://github.com/erlang/otp/security/advisories/GHSA-5vp4-58hc-h8cc",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71380",
        "https://github.com/erlang/otp/commit/81b453aac5a006bb8d26405f2bc3cf24e9d7733c",
        "https://github.com/erlang/otp"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-772"
        ],
        "cna_assigner": "EEF",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "5.10"
                  },
                  {
                    "fixed": "9.3.2.7"
                  },
                  {
                    "introduced": "9.4"
                  },
                  {
                    "fixed": "9.6.2.3"
                  },
                  {
                    "introduced": "9.7"
                  },
                  {
                    "fixed": "9.7.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71380.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-71380",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498601,
  "published_at": "2026-09-01T14:35:31.192+00:00"
}