MediumFix available

Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault

Type: advisorySources: OSV

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the authorization response, it can invoke callbacks_ after the callback owner has been destroyed, causing a use-after-free and process crash under production traffic. The relevant scope boundary is that the vulnerable path uses the HTTP ext_authz client; the advisory does not establish the same trigger for unrelated filters. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

Products: envoy
Affected versions: Not specified
Fixed versions: 1.36.10, 1.37.6, 1.38.4, 1.39.1
CVEs: CVE-2026-50572
Confirmed fixed CVEs: Not specified
Updated in this feed: 27 Oct 2026, 11:22 UTC · Revision 1

Source evidence

Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault

core-osv · Original source

Published 29 Sept 2026, 08:43 UTC

osv:BIT-envoy-2026-50572

envoy

Fixed versions: 1.36.10, 1.37.6, 1.38.4, 1.39.1

Complete source record

{
  "id": "c6976f9d7e3e3523eb30facae2ff1b074643023c13dfd6a291535f92c4c2ce5e",
  "url": "https://osv.dev/vulnerability/BIT-envoy-2026-50572",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault",
    "summary": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the authorization response, it can invoke callbacks_ after the callback owner has been destroyed, causing a use-after-free and process crash under production traffic. The relevant scope boundary is that the vulnerable path uses the HTTP ext_authz client; the advisory does not establish the same trigger for unrelated filters. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.",
    "evidence": "osv:BIT-envoy-2026-50572",
    "products": [
      {
        "name": {
          "value": "envoy",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.36.10",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.37.6",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.38.4",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.39.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "BIT-envoy-2026-50572",
      "aliases": [
        "BIT-envoy-2026-50572",
        "CVE-2026-50572",
        "GHSA-q8wp-gf7q-m8cv"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.36.10"
                },
                {
                  "introduced": "1.37.0"
                },
                {
                  "fixed": "1.37.6"
                },
                {
                  "introduced": "1.38.0"
                },
                {
                  "fixed": "1.38.4"
                },
                {
                  "introduced": "1.39.0"
                },
                {
                  "fixed": "1.39.1"
                }
              ]
            }
          ],
          "package": {
            "name": "envoy",
            "purl": "pkg:bitnami/envoy",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V3",
              "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/envoy/BIT-envoy-2026-50572.json"
          }
        }
      ],
      "modified": "2026-10-06T15:15:05.426852665Z",
      "provider": "osv",
      "references": [
        "https://github.com/envoyproxy/envoy/commit/8dacef38337aeffd62866b5c5910104b63b33db8",
        "https://github.com/envoyproxy/envoy/commit/a49085623654e27e9ad6298928557644b849d7ce",
        "https://github.com/envoyproxy/envoy/commit/c1b29534a294cb0999e99e1fe0de000310165f03",
        "https://github.com/envoyproxy/envoy/commit/c524571ffad517ba650d9563f85afa89194e2cfb",
        "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10",
        "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
        "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
        "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
        "https://github.com/envoyproxy/envoy/security/advisories/GHSA-q8wp-gf7q-m8cv",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50572"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
        ],
        "severity": "Medium"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50572",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 89127,
  "published_at": "2026-09-29T08:43:03.503+00:00"
}