---
cve: "CVE-2026-28351"
severity: "MEDIUM"
cvss: 6.9
epss: "42%"
vendor: "py-pdf"
kev: false
exploited: false
published: "2026-02-27 20:59:16"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T10:56:26+02:00"
---

# CVE-2026-28351

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

## 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)

- 1650bc31e807d8091464c228b7eabd6fef4c6c2a (Commit)
- f309c6003746414dc7b5048c19e6d879ff2dc858 (Commit)

## Referenzen

- <https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg>
- <https://github.com/py-pdf/pypdf/pull/3664>
- <https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858>
- <https://github.com/py-pdf/pypdf/releases/tag/6.7.4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-28351) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_