CVE-2026-26309

MEDIUM

5.3

Description

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.

Details CVE

Score CVSS v3.15.3

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/10/2026

Derniere modification3/11/2026

Sourcenvd

Observations honeypot0

Produits affectes

envoyproxy:envoy

Faiblesses (CWE)

CWE-193

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-56cj-wgg3-x943(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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