Detections
Analytics

SCA: security update for Twisted (GHSA-2qrf-pqgx-qh9v)

medium Tenable Cloud Security Plugin ID 477264

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to
 26.10.0rc1, twisted.mail.imap4.IMAP4Server reaches twisted.mail.imap4.parseNestedParens with a negative
 literal size in an authenticated SEARCH command after the client enters the selected mailbox state. The
 negative size moves the parser cursor below zero, and Python's negative indexing prevents the synchronous
 scanning loop from terminating. The loop freezes the single-threaded reactor, stopping other IMAP
 connections and any SMTP or POP3 services hosted in the same process until restart. This issue is fixed in
 version 26.10.0rc1. (CVE-2026-115774)

Solution

Update the Twisted library and its related packages to version 26.10.0rc1 or later.

See Also

https://github.com/advisories/GHSA-2qrf-pqgx-qh9v

Plugin Details

Severity: Medium

ID: 477264

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/24/2026

Updated: 10/24/2026

Risk Information

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:N/A:C

CVSS Score Source: CVE-2026-115774

CVSS v3

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/23/2026

Vulnerability Publication Date: 10/23/2026

Reference Information

CVE: CVE-2026-115774