DailyCVE@dailycve
🟠 Twisted, Infinite-Loop Denial of Service, #CVE-2026-115774 (Moderate) -DC-Oct2026-3730 https://dailycve.com/twisted-infinite-loop-denial-of-service-cve-2026-115774-moderate-dc-oct2026-3730/
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CVE-2026-115774
LOWCVSS 4.9 · MEDIUMImmediate actions
- Track advisory updates for patch or workaround availability
Recommended action window: Monitor and triage in normal cycle
NVD description
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.
0.0/ 10 priority
Sources & remediation
Other references
Weakness type (CWE)
CWE-400CWE-835
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE