---
cve: "CVE-2026-28435"
severity: "HIGH"
cvss: 7.5
epss: "42%"
vendor: "yhirose"
kev: false
exploited: false
published: "2026-03-04 20:16:19"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T00:26:14+02:00"
---

# CVE-2026-28435

> 7.5 HIGH · 🧪 PoC

## Beschreibung

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, cpp-httplib (httplib.h) does not enforce Server::set_payload_max_length() on the decompressed request body when using HandlerWithContentReader (streaming ContentReader) with Content-Encoding: gzip (or other supported encodings). A small compressed payload can expand beyond the configured payload limit and be processed by the application, enabling a payload size limit bypass and potential denial of service (CPU/memory exhaustion). This vulnerability is fixed in 0.35.0.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 85b18a9c6431877188a706ba3c61679fa9de3e27 (Commit)
- c99d7472b5cf4869d3897b9afc9792063a3d15a8 (Commit)

## Referenzen

- <https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xvfx-w463-6fpp>
- <https://github.com/yhirose/cpp-httplib/commit/c99d7472b5cf4869d3897b9afc9792063a3d15a8>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-28435) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_