Envoy up to 1.22.8/1.23.5/1.24.3/1.25.2 Pipelined Request input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical was found in Envoy up to 1.22.8/1.23.5/1.24.3/1.25.2. Affected by this vulnerability is some unknown processing of the component Pipelined Request Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy does not sanitize or escape request properties when generating request headers. This can lead to characters that are illegal in header values to be sent to the upstream service. In the worst case, it can cause upstream service to interpret the original request as two pipelined requests, possibly bypassing the intent of Envoy’s security policy. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. As a workaround, disable adding request headers based on the downstream request properties, such as downstream certificate properties.

The weakness was published 04/05/2023 as GHSA-w5w5-487h-qv8q. The advisory is shared at github.com. This vulnerability is known as CVE-2023-27493 since 03/01/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.22.9, 1.23.6, 1.24.4, 1.25.3 or 1.26.0 eliminates this vulnerability.

Similar entries are available at VDB-10859 and VDB-99568.





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (GitHub, Inc.): 🔍



VulDB Base Score: 🔍
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Class: Input validation

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Envoy 1.22.9/1.23.6/1.24.4/1.25.3/1.26.0


03/01/2023 🔍
04/05/2023 +34 days 🔍
04/05/2023 +0 days 🔍
04/05/2023 +0 days 🔍


Advisory: GHSA-w5w5-487h-qv8q
Status: Confirmed

CVE: CVE-2023-27493 (🔍)
See also: 🔍


Created: 04/05/2023 07:32 AM
Changes: 04/05/2023 07:32 AM (49)
Complete: 🔍
Cache ID: 3:0B3:40


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