CVE-2026-47204: CWE-476: NULL Pointer Dereference in envoyproxy envoy
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.26.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the envoy.filters.http.grpc_stats filter crashes (null pointer dereference / segfault) when a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a direct_response route. A single unauthenticated HTTP request crashes the Envoy process. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
AI Analysis
Technical Summary
Envoy proxy versions from 1.26.0 up to but not including 1.35.13, 1.36.9, 1.37.5, and 1.38.3 contain a null pointer dereference vulnerability in the envoy.filters.http.grpc_stats filter. When a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a direct_response route, the filter crashes, resulting in a segmentation fault. This vulnerability can be triggered by a single unauthenticated HTTP request, causing the Envoy process to crash and resulting in denial of service. The vulnerability is tracked as CWE-476 (NULL Pointer Dereference) and has a CVSS v3.1 base score of 6.5 (medium severity).
Potential Impact
An unauthenticated attacker can cause the Envoy proxy process to crash by sending a specially crafted HTTP request using the Connect protocol to a direct_response route. This results in a denial of service condition, disrupting service availability. There is no confidentiality or integrity impact reported.
Mitigation Recommendations
This vulnerability is fixed in Envoy versions 1.35.13, 1.36.9, 1.37.5, and 1.38.3. Users should upgrade to one of these fixed versions or later to remediate the issue. Patch status is confirmed by the version-based fixes stated in the advisory. No other mitigations or workarounds are specified.
CVE-2026-47204: CWE-476: NULL Pointer Dereference in envoyproxy envoy
Description
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.26.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the envoy.filters.http.grpc_stats filter crashes (null pointer dereference / segfault) when a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a direct_response route. A single unauthenticated HTTP request crashes the Envoy process. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/envoyproxy/envoyRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Envoy proxy versions from 1.26.0 up to but not including 1.35.13, 1.36.9, 1.37.5, and 1.38.3 contain a null pointer dereference vulnerability in the envoy.filters.http.grpc_stats filter. When a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a direct_response route, the filter crashes, resulting in a segmentation fault. This vulnerability can be triggered by a single unauthenticated HTTP request, causing the Envoy process to crash and resulting in denial of service. The vulnerability is tracked as CWE-476 (NULL Pointer Dereference) and has a CVSS v3.1 base score of 6.5 (medium severity).
Potential Impact
An unauthenticated attacker can cause the Envoy proxy process to crash by sending a specially crafted HTTP request using the Connect protocol to a direct_response route. This results in a denial of service condition, disrupting service availability. There is no confidentiality or integrity impact reported.
Mitigation Recommendations
This vulnerability is fixed in Envoy versions 1.35.13, 1.36.9, 1.37.5, and 1.38.3. Users should upgrade to one of these fixed versions or later to remediate the issue. Patch status is confirmed by the version-based fixes stated in the advisory. No other mitigations or workarounds are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-18T22:07:37.436Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3ec10ed9e07477746fae0f
Added to database: 06/26/2026, 18:12:30 UTC
Last enriched: 07/03/2026, 22:30:43 UTC
Last updated: 08/10/2026, 12:41:11 UTC
Views: 68
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