---
cve: "CVE-2026-3945"
severity: "HIGH"
cvss: 8.7
epss: "58%"
vendor: "Tinyproxy"
kev: false
exploited: false
published: "2026-03-30 08:16:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T15:52:22+02:00"
---

# CVE-2026-3945

> 8.7 HIGH · 🧪 PoC

## Beschreibung

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol without properly validating overflow conditions (e.g., errno == ERANGE).

## 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)

- 969852c (Commit)
- bb7edc4 (Commit)

## Referenzen

- <https://github.com/tinyproxy/tinyproxy/issues/602>
- <https://github.com/tinyproxy/tinyproxy/pull/603>
- <https://github.com/tinyproxy/tinyproxy/commit/969852c>
- <https://github.com/tinyproxy/tinyproxy/commit/bb7edc4>
- <https://github.com/tinyproxy/tinyproxy/releases>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-3945) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_