Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| envoyproxy | envoy | affected |
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Configuration 1 [-]
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No data.
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|---|---|---|---|---|---|---|---|---|---|---|
| Envoyproxy | Envoy |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.618% probability within 30 days)
| Type | Values Removed | Values Added |
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| CPEs | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* |
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| Metrics |
ssvc
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| Description | No description is available for this CVE. | 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. |
| Title | envoy: envoy: scoped IPv6 handling crash for HTTP/3 clients in original DST clusters | Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters |
| Weaknesses | CWE-754 | |
| References |
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Envoyproxy
Envoyproxy envoy |
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| Vendors & Products |
Envoyproxy
Envoyproxy envoy |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | No description is available for this CVE. | |
| Title | envoy: envoy: scoped IPv6 handling crash for HTTP/3 clients in original DST clusters | |
| Weaknesses | CWE-119 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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