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Vulnerability record · CVE-2023-46137 · published 25 October 2023

CVE-2023-46137: Twisted http request smuggling vulnerability

Twisted · Twisted

Twisted is an event-based framework for internet applications. Prior to version 23.10.0rc1, when sending multiple HTTP requests in one TCP packet, twisted.web will process the requests asynchronously without guaranteeing the response order. If one of the endpoints is controlled by an attacker, the attacker can delay the response on purpose to manipulate the response of the second request when a victim launched two requests using HTTP pipeline. Version 23.10.0rc1 contains a patch for this issue.

5.3 CVSS 3.1 Medium EPSS 0.77% · top 46.2% CWE-444 · HTTP request smuggling
5.3CVSS 3.1 base score
0.77%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Twisted is an event-based framework for internet applications. Prior to version 23.10.0rc1, when sending multiple HTTP requests in one TCP packet, twisted.web will process the requests asynchronously without guaranteeing the response order. If one of the endpoints is controlled by an attacker, the attacker can delay the response on purpose to manipulate the response of the second request when a victim launched two requests using HTTP pipeline. Version 23.10.0rc1 contains a patch for this issue.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/twisted/twisted/security/advisories/GHSA-xc8x-vp79-p3wm ExploitVendor Advisory
https://github.com/twisted/twisted/security/advisories/GHSA-xc8x-vp79-p3wm ExploitVendor Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00028.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-46137), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.