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.conch.telnet.Telnet.dataReceived appends every byte received after IAC SB to a
    persistent subnegotiation buffer until IAC SE is received, without applying a maximum length. Telnet
    option negotiation occurs before authentication, so an unauthenticated peer can omit the terminator and
    continuously grow the buffer. The resulting memory exhaustion can terminate the process and every service
    it hosts. This issue is fixed in version 26.10.0rc1. (CVE-2026-115778)

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  Twisted 是基于事件的框架，适用于支持 Python 3.6+ 的 Internet 应用程序。在低于 26.10.0rc1 的版本中，twisted.conch.telnet.Telnet.dataReceived 将 IAC SB 后接收的每个字节附加到持久性子协商缓冲区，直到收到 IAC SE，而无需应用最大长度。Telnet 选项协商在认证之前发生，因此未经认证的对等机可以省略终止符并持续增加缓冲区。所产生的内存耗尽可终止进程及其托管的每项服务。已修复版本 26.10.0rc1 中的此问题。（CVE-2026-115778）

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  Twisted 是適用於網際網路應用程式的事件型框架，支持 Python 3.6+。在 26.10.0rc1 之前，twisted.conch.telnet.Telnet.dataReceived 會將 IAC SB 之後收到的每個位元組附加至持續子協商緩衝區，直到收到 IAC SE 為止，而不套用最大長度。Telnet 選項協商會在驗證之前發生，因此未經驗證的對等體可以省略終止符並持續增加緩衝區。產生的記憶體耗盡可能會終止處理程序及其託管的每個服務。此問題已在 26.10.0rc1 版中修正。（CVE-2026-115778）

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - Twisted は、Python 3.6+ をサポートする、イベントベースのインターネットアプリケーション用フレームワークです。26.10.0rc1より前の twisted.conch.telnet.Telnet.dataReceived は、IAC SB の後に受信したすべてのバイトを、IAC SE を受信するまで、最大長を適用せずに永続的なサブネゴシエーションバッファに追加します。Telnet オプションのネゴシエーションは認証の前に発生するため、認証されていないピアは終端子を省略し、バッファを継続的に増やすことができます。結果として生じるメモリの枯渇により、プロセスとそれがホストするすべてのサービスが停止する可能性があります。この問題はバージョン 26.10.0rc1 で修正されました。(CVE-2026-115778)

Nessus は、ベンダーから報告されたパッケージの存在に依存していることに注意してください。

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to     26.10.0rc1, twisted.conch.telnet.Telnet.dataReceived appends every byte received after IAC SB to a     persistent subnegotiation buffer until IAC SE is received, without applying a maximum length. Telnet     option negotiation occurs before authentication, so an unauthenticated peer can omit the terminator and     continuously grow the buffer. The resulting memory exhaustion can terminate the process and every service     it hosts. This issue is fixed in version 26.10.0rc1. (CVE-2026-115778)

Note that Nessus relies on the presence of the package as reported by the vendor.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3385 advisory.

    A flaw was found in Twisted. An unauthenticated remote attacker can cause a Denial of Service (DoS) by     exhausting server memory. The issue occurs because the XML stream parser retains unfinished elements in     memory without enforcing size or element count limits. By transmitting a continuous stream of child     elements within an unclosed container during pre-authentication communication, an attacker can crash the     server process. (CVE-2026-115775)

    A flaw was found in Twisted. The Internet Relay Chat (IRC) protocol implementation does not enforce a     maximum line length when buffering incoming connection data. An unauthenticated remote attacker can     exploit this by sending a continuous stream of data without line feed characters to an IRC service. This     causes the server process to consume excessive memory until it runs out of resources, resulting in a     Denial of Service (DoS) that terminates connections for all users. (CVE-2026-115776)

    A flaw was found in Twisted. The Telnet service implementation fails to enforce a size limit on incoming     data buffers during protocol option negotiation, which occurs before user authentication. An     unauthenticated remote attacker can exploit this vulnerability by sending a continuous stream of     subnegotiation data without a terminating delimiter. This causes unbounded memory consumption that can     crash the application, resulting in a Denial of Service (DoS). (CVE-2026-115778)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
477240	SCA: security update for Twisted (GHSA-cwm5-jh59-mwxr)	Tenable Cloud Security	SCA Checks	10/24/2026	10/24/2026	high
477240	SCA: security update for Twisted (GHSA-cwm5-jh59-mwxr)	Tenable Self-Hosted Container Security	SCA Checks	10/24/2026	10/24/2026	high
478041	Chainguard: synapse: security update to 1.164.1-r2	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	10/31/2026	10/31/2026	high
478041	Chainguard: synapse: security update to 1.164.1-r2	Tenable Cloud Security	Chainguard Local Security Checks	10/31/2026	10/31/2026	high
371718	Linux Distros 未修补的漏洞：CVE-2026-115778	Nessus	Misc.	10/24/2026	11/4/2026	high
371718	Linux Distros 未修補弱點：CVE-2026-115778	Nessus	Misc.	10/24/2026	11/4/2026	high
371718	Linux Distros のパッチ未適用の脆弱性: CVE-2026-115778	Nessus	Misc.	10/24/2026	11/4/2026	high
371718	Linux Distros Unpatched Vulnerability : CVE-2026-115778	Nessus	Misc.	10/24/2026	11/4/2026	high
377965	Amazon Linux 2023 : python3-twisted, python3-twisted+tls (ALAS2023-2026-3385)	Nessus	Amazon Linux Local Security Checks	11/9/2026	11/9/2026	high

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