Vulnerability-Lookup

ubuntu-cve-2026-71380

Vulnerability from osv_ubuntu

Published

2026-09-03 00:00

Modified

2026-09-03 00:00

Summary

Details

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.

Severity

8.7 (High)


                    
                      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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-71380	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-71380	REPORT
	https://github.com/erlang/otp/security/advisories…	REPORT
	https://cna.erlef.org/cves/CVE-2026-71380.html	REPORT
	https://osv.dev/vulnerability/EEF-CVE-2026-71380	REPORT
	https://github.com/erlang/otp/commit/81b453aac5a0…	REPORT
	https://www.erlang.org/doc/system/versions.html#o…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "erlang",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
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            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-asn1",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-base",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-base-hipe",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-common-test",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-corba",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-crypto",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
            "binary_name": "erlang-debugger",
            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
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            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
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            "binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm1"
          },
          {
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          },
          {
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          {
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          {
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          {
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      },
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      },
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "1:16.b.2-dfsg-2ubuntu1",
        "1:16.b.3-dfsg-1ubuntu1",
        "1:16.b.3-dfsg-1ubuntu2",
        "1:16.b.3-dfsg-1ubuntu2.1",
        "1:16.b.3-dfsg-1ubuntu2.2",
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          },
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          },
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CVE-2026-71380 (GCVE-0-2026-71380)

Vulnerability from cvelistv5 – Published: 2026-09-01 14:35 – Updated: 2026-09-01 15:52

Title

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

Summary

Severity

8.7 (High)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 15:52 UTC

CWE

CWE-772 - Missing Release of Resource after Effective Lifetime

Assigner

EEF mitre root

References

5 references

URL	Tags
https://github.com/erlang/otp/security/advisories…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-71380.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-71380	related
https://www.erlang.org/doc/system/versions.html#o…	x_version-scheme
https://github.com/erlang/otp/commit/81b453aac5a0…	patch

Impacted products

3 products

Vendor	Product	Version
Erlang	OTP	Unknown: 0 , < 17.0 (otp) Affected: 17.0 , < 27.3.4.17 (otp) Affected: 28.0 , < 28.5.0.6 (otp) Affected: 29.0 , < 29.0.6 (otp) cpe:2.3:a:erlang:erlang\/otp::::::::
Erlang	OTP	Unknown: 0 , < 5.10 (otp) Affected: 5.10 , < 9.3.2.7 (otp) Affected: 9.4 , < 9.6.2.3 (otp) Affected: 9.7 , < 9.7.2 (otp) cpe:2.3:a:erlang:erlang\/otp::::::::
Erlang	OTP	Affected: 84adefa331c4159d432d22840663c38f155cd4c1 , < 81b453aac5a006bb8d26405f2bc3cf24e9d7733c (git) cpe:2.3:a:erlang:erlang\/otp::::::::

Credits

Konrad Pietrzak / Ericsson Lukas Backström / Erlang Solutions

Show details on NVD website

JSON

To clipboard

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            {
              "cweId": "CWE-772",
              "description": "CWE-772 Missing Release of Resource after Effective Lifetime",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-01T14:35:31.192Z",
        "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "shortName": "EEF"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "related"
          ],
          "url": "https://github.com/erlang/otp/security/advisories/GHSA-5vp4-58hc-h8cc"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://cna.erlef.org/cves/CVE-2026-71380.html"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://osv.dev/vulnerability/EEF-CVE-2026-71380"
        },
        {
          "tags": [
            "x_version-scheme"
          ],
          "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/erlang/otp/commit/81b453aac5a006bb8d26405f2bc3cf24e9d7733c"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "httpd applies no timeout while receiving a request body, parking a worker on a stalled client",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cul\u003e\n\u003cli\u003eSet \u003ccode\u003eminimum_bytes_per_second\u003c/code\u003e in the httpd configuration, for example \u003ccode\u003e{minimum_bytes_per_second, 200}\u003c/code\u003e. This arms a periodic byte-rate check that terminates a connection which has stopped delivering data, reclaiming the parked worker. The check is disabled by default.\u003c/li\u003e\n\u003cli\u003ePlace a reverse proxy in front of httpd that enforces its own body-read timeout, such as \u003ccode\u003eclient_body_timeout\u003c/code\u003e in nginx.\u003c/li\u003e\n\u003cli\u003eRestrict access to the server to trusted clients where the deployment allows it.\u003c/li\u003e\n\u003c/ul\u003e"
            },
            {
              "base64": false,
              "type": "text/markdown",
              "value": "* Set `minimum_bytes_per_second` in the httpd configuration, for example `{minimum_bytes_per_second, 200}`. This arms a periodic byte-rate check that terminates a connection which has stopped delivering data, reclaiming the parked worker. The check is disabled by default.\n* Place a reverse proxy in front of httpd that enforces its own body-read timeout, such as `client_body_timeout` in nginx.\n* Restrict access to the server to trusted clients where the deployment allows it."
            }
          ],
          "value": "* Set minimum_bytes_per_second in the httpd configuration, for example {minimum_bytes_per_second, 200}. This arms a periodic byte-rate check that terminates a connection which has stopped delivering data, reclaiming the parked worker. The check is disabled by default.\n* Place a reverse proxy in front of httpd that enforces its own body-read timeout, such as client_body_timeout in nginx.\n* Restrict access to the server to trusted clients where the deployment allows it."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
    "assignerShortName": "EEF",
    "cveId": "CVE-2026-71380",
    "datePublished": "2026-09-01T14:35:31.192Z",
    "dateReserved": "2026-08-17T12:45:01.757Z",
    "dateUpdated": "2026-09-01T15:52:08.684Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.