---
cve: "CVE-2026-76243"
severity: "CRITICAL"
cvss: 9.2
epss: "0.4%"
vendor: "eidetic-labs"
kev: false
exploited: false
published: "2026-08-19 14:17:56"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T15:01:55+02:00"
---

# CVE-2026-76243

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

stigmem versions before 0.9.0a2 allow unauthenticated access when authentication is disabled on non-loopback deployments. Attackers can perform read, write, and federation operations with anonymous identity when nodes are exposed outside local development environments.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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)

- 18ec5dbe3a3970d804f2013b4ae53dd2da8ed4ac (Commit)

## Referenzen

- <https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5>
- <https://www.vulncheck.com/advisories/stigmem-before-0a2-authentication-bypass-via-disabled-auth>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-76243) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_