CVE-2026-73549 | 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-prox
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.
- 🔗 github.com/envoyproxy/envoy/security/advisories/GHSA…
- 🔗 github.com/envoyproxy/envoy/commit/109e5a5b08ad10d99…
- 🔗 github.com/envoyproxy/envoy/commit/59b1744a6cb62746d…
- 🔗 github.com/envoyproxy/envoy/commit/6e39f4c94deff7a60…
- 🔗 github.com/envoyproxy/envoy/commit/ab2dca2d65b079768…
- 🔗 github.com/envoyproxy/envoy/releases/tag/v1.36.10
- 🔗 github.com/envoyproxy/envoy/releases/tag/v1.37.6
- 🔗 github.com/envoyproxy/envoy/releases/tag/v1.38.4
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| Tier | 2026-09-04 | 2026-09-21 |
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| ≥10 % | 0 | 7 |
| <10 % | 300 | 0 |
CVE-2026-73549 | 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-prox
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
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