CVE-2026-26309

Published: Mar 10, 2026 Last Modified: Mar 11, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0000
Percentile
0,0th
Updated

EPSS Score Trend (Last 7 Days)

193

Off-by-one Error

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Instability Modify Memory Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Languages: C, Not Language-Specific
View CWE Details
Application

Envoy by Envoyproxy

Product Information
Vendor Envoyproxy
Product Envoy
Version Range Affected
From 1.35.0 (inclusive)
To 1.35.8 (exclusive)
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Envoy by Envoyproxy

Product Information
Vendor Envoyproxy
Product Envoy
Version Range Affected
From 1.36.0 (inclusive)
To 1.36.5 (exclusive)
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Envoy by Envoyproxy

Product Information
Vendor Envoyproxy
Product Envoy
Version Range Affected
To 1.34.13 (exclusive)
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Envoy by Envoyproxy

Product Information
Vendor Envoyproxy
Product Envoy
Version 1.37.0
cpe:2.3:a:envoyproxy:envoy:1.37.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/envoyproxy/envoy/security/advisories/GHS…
https://github.com/envoyproxy/envoy/security/advisories/GHSA-56cj-wgg3-x943