Twisted Vulnerability — Ubuntu Security Update (USN-9000-1)
USN-9000-1 fixes CVE-2026-106454 in Twisted on Ubuntu: the IMAP server mishandled wildcard patterns in mailbox LIST commands, letting an authenticated remote user drive excessive resource consumption — a denial-of-service flaw (CWE-1333 inefficient regex/ pattern class, CVSS 4.3). Update: sudo apt update && sudo apt upgrade and restart Twisted-based services.
SharedLicense लाइसेंस के तहत इसका अर्थ
Authenticated DoS flaws in mail-infrastructure libraries let any valid account degrade the mail service for everyone — no exploit skill needed beyond a crafted LIST pattern.
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USN-9000-1
Publication date
4 November 2026
Overview
Twisted could be made to crash if it received specially crafted
network traffic from an authenticated user.
Releases
Open side navigation
Packages
- twisted – Event-based framework for internet applications
Details
It was discovered that Twisted’s IMAP server mishandled wildcard
patterns in mailbox list commands. An authenticated remote attacker
could possibly use this issue to cause Twisted to use excessive
resources, leading to a denial of service.
It was discovered that Twisted’s IMAP server mishandled wildcard
patterns in mailbox list commands. An authenticated remote attacker
could possibly use this issue to cause Twisted to use excessive
resources, leading to a denial of service.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.
The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
|
26.10
stonking |
python3-twisted – | ||
|
26.04
LTS resolute |
python3-twisted – | ||
|
24.04
LTS noble |
python3-twisted – | ||
|
22.04
LTS jammy |
python3-twisted – | ||
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References
अक्सर पूछे जाने वाले प्रश्न
What is CVE-2026-106454?
Who is affected?
How do I apply the fix?
Why does an authenticated-only flaw still matter?
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