CVE-2026-26311

Published: Mar 10, 2026 Last Modified: Mar 11, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,9
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

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, a logic vulnerability in Envoy's HTTP connection manager (FilterManager) that allows for Zombie Stream Filter Execution. This issue creates a 'Use-After-Free' (UAF) or state-corruption window where filter callbacks are invoked on an HTTP stream that has already been logically reset and cleaned up. The vulnerability resides in source/common/http/filter_manager.cc within the FilterManager::decodeData method. The ActiveStream object remains valid in memory during the deferred deletion window. If a DATA frame arrives on this stream immediately after the reset (e.g., in the same packet processing cycle), the HTTP/2 codec invokes ActiveStream::decodeData, which cascades to FilterManager::decodeData. FilterManager::decodeData fails to check the saw_downstream_reset_ flag. It iterates over the decoder_filters_ list and invokes decodeData() on filters that have already received onDestroy(). 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
0,0001
Percentile
0,0th
Updated

EPSS Score Trend (Last 7 Days)

416

Use After Free

Stable
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Confidentiality
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
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-84xm-r438-86px