Is CVE-2024-23326 actively exploited?

CVE-2024-23326 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2024-23326?

CVE-2024-23326 has a CVSS score of 5.9 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

How do I patch CVE-2024-23326?

Patch guidance is available from envoyproxy security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-23326.

CVE-2024-23326 - remediation guidance & executive summary

Q: Which products are affected by CVE-2024-23326?

4 products: envoyproxy envoy, envoyproxy envoy, envoyproxy envoy, envoyproxy envoy.

Description

Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230#section-6.7 a server sends 101 when switching protocols. Envoy incorrectly accepts a 200 response from a server when requesting a protocol upgrade, but 200 does not indicate protocol switch. This opens up the possibility of request smuggling through Envoy if the server can be tricked into adding the upgrade header to the response.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-391 CWE-444

Metadata

Primary Vendor: ENVOYPROXY
Published: 6/4/2024
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

envoyproxy : envoyenvoyproxy : envoyenvoyproxy : envoyenvoyproxy : envoy

Remediation Guidance

Executive Summary

Cite this page

CVE-2024-23326. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2024-23326

View on NIST NVD

CVE-2024-23326 vulnerability