4.3

CVE-2026-106454: twisted

CVSS: 4.3v3.1MediumAwaiting analysis
AliasesGHSA-8pqf-f4m5-798gUBUNTU-CVE-2026-106454DEBIAN-CVE-2026-106454
Published 06-10-2026Last modified 07-10-2026
Open JSON

Vulnerability summary

CVE-2026-106454 is a medium (CVSS 4.3) vulnerability in twisted. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.7% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 07-10-2026
    Last modifiedVulnerability information updated.

Description

Twisted is an event-based framework for internet applications, supporting Python 3.6+. In 25.5.0 and earlier, wildcardToRegexp() in twisted/mail/imap4.py translates the IMAP asterisk and percent wildcards but passes all other characters from an authenticated client's LIST or LSUB pattern directly to re.compile(), allowing nested or otherwise expensive regular expression constructs to cause catastrophic backtracking when matched against mailbox names. Because Twisted uses a cooperative single-threaded reactor, the blocking match suspends all server input and output for the duration of the match. No fixed release is available as of this review.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202620-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • awxAll versions (No fix recorded)
  • synapseAll versions (No fix recorded)
Debian1 product
  • twistedAll versions (No fix recorded) | < 26.4.0-5
Opensuse1 product
  • python-Twisted&distro=openSUSE Tumbleweed< 26.4.0-4.1
PyPI1 product
  • twisted≤ 25.5.0 | ≤ 26.4.0
Twisted1 product
Ubuntu1 product
  • twistedAll versions (No fix recorded)

6 vendors · 7 products

References

12 links
Show all 12 references