---
cve: "CVE-2026-115775"
severity: "HIGH"
cvss: 8.7
epss: "0.7%"
vendor: "twisted"
kev: false
exploited: false
published: "2026-10-23 21:17:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-25T14:11:30+01:00"
---

# CVE-2026-115775

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-10-23 20:16:29
- CNA-CVSS: **8.7** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 875d118c9a82a4f55a92ff399bd31f8928a52ad3 (Commit)
- 8873814bec8288e2466fad4d2c4d64039beb88b0 (Commit)

## Referenzen

- <https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73>
- <https://github.com/twisted/twisted/pull/12751>
- <https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0>
- <https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-115775/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_