CVE-2026-73549Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-754
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
envoyproxy envoy envoyproxy:envoy (from the name) | before 1.36.10; from 1.37.0, < 1.37.6; from 1.38.0, < 1.38.4; from 1.39.0, < 1.39.1 | CNA record |
envoyproxy envoy envoyproxy:envoy | before 1.36.10; from 1.37.0 before 1.37.6; from 1.38.0 before 1.38.4; from 1.39.0 before 1.39.1 | NVD |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-jp5f-qr64-c9vwx-refsource-confirm, vendor-advisory, mitigation
- https://github.com/envoyproxy/envoy/commit/109e5a5b08ad10d99074cefd55a747a16ee64da7x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/commit/59b1744a6cb62746db418ac06fc5e359fd25fdb7x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/commit/6e39f4c94deff7a60d382c2d95883e0ea49ff691x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/commit/ab2dca2d65b079768230a7c3d825afeefa330215x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/releases/tag/v1.36.10x-refsource-misc, release-notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.37.6x-refsource-misc, release-notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.38.4x-refsource-misc, release-notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.39.1x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.