---
cve: "CVE-2026-28804"
severity: "MEDIUM"
cvss: 6.9
epss: "40%"
vendor: "py-pdf"
kev: false
exploited: false
published: "2026-03-06 07:16:01"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T05:08:43+02:00"
---

# CVE-2026-28804

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

## CVSS-Vektor

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

- 7c2bcddd8e3c64903e23398d12b60ef432ff4531 (Commit)
- 648c627d2657447dfb1773412af05a0a5103b98f (Commit)

## Referenzen

- <https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852>
- <https://github.com/py-pdf/pypdf/pull/3666>
- <https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f>
- <https://github.com/py-pdf/pypdf/releases/tag/6.7.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-28804) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_