CVE-2026-48706: envoy from 1.34.0 (inclusive), before 1.35.13 (exclusive), from 1.36.0 (inclusive), before 1.36.9 (exclusive), from…

Affected technology

envoy · from 1.34.0 (inclusive), before 1.35.13 (exclusive)
envoyproxy

envoy · from 1.36.0 (inclusive), before 1.36.9 (exclusive)
envoyproxy

envoy · from 1.37.0 (inclusive), before 1.37.5 (exclusive)
envoyproxy

envoy · from 1.38.0 (inclusive), before 1.38.3 (exclusive)
envoyproxy

envoy · >= 1.38.0, < 1.38.3, >= 1.37.0, < 1.37.5, >= 1.36.0, < 1.36.9, >= 1.34.0, < 1.35.13
envoyproxy

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

If an attacker can trigger a statistic name longer than 16KiB—for example, by sending an HTTP or gRPC request with an extremely long request path (:path) that is recorded by the grpc_stats filter configured with stats_for_all_methods: true—the flusher will attempt to copy the metric name using memcpy operations beyond the allocated heap buffer boundaries. Vendor/CNA’s CVSS 3.1 assessment (base score 5.9/10) rates confidentiality and integrity impact as none; availability impact as high. NVD’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.