CVE-2026-73513 (GCVE-0-2026-73513)

Vulnerability from cvelistv5 – Published: 2026-09-21 19:40 – Updated: 2026-09-21 19:40
VLAI
Title
Envoy: oghttp2 upstream trailers incorrect handling
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 optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without END_STREAM. Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving ClientStreamImpl with a dangling response_decoder_ reference. A later frame on the stream can dispatch through the freed object and crash the process. The relevant scope boundary is that the default nghttp2 codec rejects the malformed trailers, and the trigger is upstream-only with oghttp2 enabled. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
envoyproxy envoy Affected: < 1.36.10
Affected: >= 1.37.0, < 1.37.6
Affected: >= 1.38.0, < 1.38.4
Affected: >= 1.39.0, < 1.39.1
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "envoy",
          "vendor": "envoyproxy",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.36.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.37.0, \u003c 1.37.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.38.0, \u003c 1.38.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.39.0, \u003c 1.39.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without END_STREAM. Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving ClientStreamImpl with a dangling response_decoder_ reference. A later frame on the stream can dispatch through the freed object and crash the process. The relevant scope boundary is that the default nghttp2 codec rejects the malformed trailers, and the trigger is upstream-only with oghttp2 enabled. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T19:40:49.119Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-jjmm-fw8p-crpw",
          "tags": [
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          ],
          "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-jjmm-fw8p-crpw"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/commit/0d33268d7d8cdc5c8ffef462e0cceefa56156b72",
          "tags": [
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          ],
          "url": "https://github.com/envoyproxy/envoy/commit/0d33268d7d8cdc5c8ffef462e0cceefa56156b72"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/commit/3df69eeee220d6a4088cfdd3be79b55e2e6d3514",
          "tags": [
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          "url": "https://github.com/envoyproxy/envoy/commit/3df69eeee220d6a4088cfdd3be79b55e2e6d3514"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/commit/c4610b6c85d72ed01e014c2a1aba2934a2b774e9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/envoyproxy/envoy/commit/c4610b6c85d72ed01e014c2a1aba2934a2b774e9"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/commit/e6963c6b64cd62aa8e078ef17c76052b6e33e82b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/envoyproxy/envoy/commit/e6963c6b64cd62aa8e078ef17c76052b6e33e82b"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
        },
        {
          "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
        }
      ],
      "source": {
        "advisory": "GHSA-jjmm-fw8p-crpw",
        "discovery": "UNKNOWN"
      },
      "title": "Envoy: oghttp2 upstream trailers incorrect handling"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-73513",
    "datePublished": "2026-09-21T19:40:49.119Z",
    "dateReserved": "2026-08-12T19:00:33.737Z",
    "dateUpdated": "2026-09-21T19:40:49.119Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "envoy",
                "vendor": "envoyproxy",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 1.36.10"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 1.37.0, \u003c 1.37.6"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 1.38.0, \u003c 1.38.4"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 1.39.0, \u003c 1.39.1"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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\u0027s optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without END_STREAM. Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving ClientStreamImpl with a dangling response_decoder_ reference. A later frame on the stream can dispatch through the freed object and crash the process. The relevant scope boundary is that the default nghttp2 codec rejects the malformed trailers, and the trigger is upstream-only with oghttp2 enabled. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."
          }
        ],
        "id": "CVE-2026-73513",
        "lastModified": "2026-09-21T20:17:27.820",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
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        "references": [
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            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/commit/0d33268d7d8cdc5c8ffef462e0cceefa56156b72"
          },
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            "url": "https://github.com/envoyproxy/envoy/commit/3df69eeee220d6a4088cfdd3be79b55e2e6d3514"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/commit/c4610b6c85d72ed01e014c2a1aba2934a2b774e9"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/commit/e6963c6b64cd62aa8e078ef17c76052b6e33e82b"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-jjmm-fw8p-crpw"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              },
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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