Web Application Vulnerabilities Runtime SCA Findings
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Envoy Proxy Off-by-one Error Vulnerability - CVE-2026-26309 - Vulnerability Database
Envoy Proxy

Envoy Proxy Off-by-one Error Vulnerability - CVE-2026-26309

Medium
Reference: CVE-2026-26309
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2026-26309
Title: Envoy Proxy Off-by-one Error Vulnerability
Overview:

Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1 1.36.5 1.35.8 and 1.34.13 an off-by-one write in Envoy::JsonEscaper::escapeString() can corrupt std::string null-termination causing undefined behavior and potentially leading to crashes or out-of-bounds reads when the resulting string is later treated as a C-string. This vulnerability is fixed in 1.37.1 1.36.5 1.35.8 and 1.34.13.