cvedb.io
CVE-2026-26309
MEDIUM · CVSS 5.3
EPSS exploitation probability: 0%
Published 2026-03-10T20:16:35.880 · Last modified 2026-06-17T10:26:03.940

Summary

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.

Affected products

envoyproxy — envoy

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.