Is CVE-2026-115776 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-115776 being exploited in the wild.

How severe is CVE-2026-115776?

High severity, with a CVSS score of 7.5, published 23 October 2026.

Which products and versions are affected?

twisted (PyPI) <= 26.4.0, ECOSYSTEM:introduced=0,fixed=26.10.0rc1; Twisted 26.4.0 and earlier.

Is there a fix for CVE-2026-115776?

Yes. twisted (PyPI): upgrade to 26.10.0rc1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-115776 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-115776?

Check whether you run twisted (PyPI) or Twisted at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-115776: Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.words.protocols.irc.IRC.

Q: Which products and versions are affected?

twisted (PyPI) <= 26.4.0, ECOSYSTEM:introduced=0,fixed=26.10.0rc1; Twisted 26.4.0 and earlier.

Q: Is there a fix for CVE-2026-115776?

Yes. twisted (PyPI): upgrade to 26.10.0rc1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-115776 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-115776?

Check whether you run twisted (PyPI) or Twisted at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-115776 · Severity: high · CVSS 7.5 · Published 2026-10-23

Twisted is a networking framework that includes an IRC server implementation. An unauthenticated attacker can send a specially crafted message without line breaks to exhaust the server's memory, crashing the service and disconnecting all users. This affects any IRC server built on Twisted's words module.

Technologies: twisted (PyPI), Twisted. Vendors: PyPI, Twisted.

Quick answers

Is CVE-2026-115776 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-115776 being exploited in the wild.
How severe is CVE-2026-115776?: High severity, with a CVSS score of 7.5, published 23 October 2026.
Which products and versions are affected?: twisted (PyPI) <= 26.4.0, ECOSYSTEM:introduced=0,fixed=26.10.0rc1; Twisted 26.4.0 and earlier.
Is there a fix for CVE-2026-115776?: Yes. twisted (PyPI): upgrade to 26.10.0rc1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-115776 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-115776?: Check whether you run twisted (PyPI) or Twisted at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

twisted (PyPI): upgrade to 26.10.0rc1 or later
```
pip install "twisted>=26.10.0rc1"
```

Technical details

An unbounded-buffer vulnerability (CWE-770) in twisted.words.protocols.irc.IRC.dataReceived appends every received byte to a per-connection buffer without enforcing a maximum length or timeout, removing data only at line feed characters. An unauthenticated remote attacker can exhaust server memory by sending data without line feeds, causing the single-threaded process to out-of-memory and crash, dropping all connections. The vulnerability exists before any authentication checks.

Affected products

Twisted Twisted 26.4.0 and earlier

Identifiers

CVE-2026-115776
GHSA-53xc-49m8-p798

Timeline

2026-10-23: disclosed

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