Description
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 Utility::copyInternetAddressAndPort and QUIC client-address paths reconstruct scoped IPv6 addresses through addressAsString and Ipv6Instance. The string includes a percent scope identifier that inet_pton cannot parse, causing an exception or abort. Kernel-provided scoped IPv6 destinations in ORIGINAL_DST transparent-proxy deployments, and affected QUIC connection paths, can therefore terminate the process. The relevant scope boundary is that the HTTP use_http_header override rejects scoped addresses earlier; the advisory's crash path requires a kernel-provided original destination or the affected QUIC path. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Affected products
envoyproxy: envoy
References9
- github.com/envoyproxy/envoy/security/advisories/GHSA-jp5f-qr64-… Vendor AdvisoryMitigation
- github.com/envoyproxy/envoy/commit/109e5a5b08ad10d99074cefd55a7… Patch
- github.com/envoyproxy/envoy/commit/59b1744a6cb62746db418ac06fc5… Patch
- github.com/envoyproxy/envoy/commit/6e39f4c94deff7a60d382c2d9588… Patch
- github.com/envoyproxy/envoy/commit/ab2dca2d65b079768230a7c3d825… Patch
- github.com/envoyproxy/envoy/releases/tag/v1.36.10 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.37.6 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.38.4 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.39.1 Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 50 · as of 8 November 2026
- CWE
- CWE-754
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