# CVE-2024-34362: Envoy affected by a crash (use-after-free) in EnvoyQuicServerStream

Status: published. Published: 2024-06-04. Updated: 2026-11-05.

Envoy is a cloud-native, open source edge and service proxy. There is a use-after-free in `HttpConnectionManager` (HCM) with `EnvoyQuicServerStream` that can crash Envoy. An attacker can exploit this vulnerability by sending a request without `FIN`, then a `RESET_STREAM` frame, and then after receiving the response, closing the connection.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- envoyproxy / envoy: >= 1.30.0, <= 1.30.1 (affected); >= 1.29.0, <= 1.29.4 (affected); >= 1.28.0, <= 1.28.3 (affected); <= 1.27.5 (affected). Source: CNA: GitHub_M
- envoyproxy / envoy: ≥ 0; < 1.27.6 (affected, custom); ≥ 1.28.0; < 1.28.4 (affected, custom); ≥ 1.29.0; < 1.29.5 (affected, custom); ≥ 1.30.0; < 1.30.2 (affected, custom). Source: ADP: CISA-ADP

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "1.27.6",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "1.28.4",
            "versionStartIncluding": "1.28.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "1.29.5",
            "versionStartIncluding": "1.29.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "1.30.2",
            "versionStartIncluding": "1.30.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: GitHub_M

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: nvd@nist.gov

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.59% as of 2026-11-05; percentile 48.32%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-416

## Exploit evidence

- exploit: https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv (security-advisories@github.com)
- exploit: https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv (af854a3a-2127-422b-91ae-364da2661108)

## References

- https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv (ADP: CVE; x_refsource_CONFIRM, x_transferred)

- https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv (security-advisories@github.com; Exploit, Third Party Advisory)

- https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv (af854a3a-2127-422b-91ae-364da2661108; Exploit, Third Party Advisory)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2024-34362; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-34362; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-34362; retrieved 2026-11-05; source updated Not reported

Revision: d0b495442f0d7e33c0d82ca1deee99d5ade0103216ec9f66e9d6cc2004e45f56

Canonical: https://y2.dev/cve/CVE-2024-34362

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