---
cve: "CVE-2025-55197"
severity: "MEDIUM"
cvss: 6.6
epss: "0.4%"
vendor: "py-pdf"
kev: false
exploited: false
published: "2025-08-13 23:15:27"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-26T06:16:25+02:00"
---

# CVE-2025-55197

> 6.6 MEDIUM · 🧪 PoC

## Beschreibung

pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including the fixed code from pypdf.filters.decompress into the existing filters file.

## 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/E:U
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 0dd57738bbdcdb63f0fb43d8a6b3d222b6946595 (Commit)

## Referenzen

- <https://github.com/py-pdf/pypdf/security/advisories/GHSA-7hfw-26vp-jp8m>
- <https://github.com/py-pdf/pypdf/issues/3429>
- <https://github.com/py-pdf/pypdf/pull/3430>
- <https://github.com/py-pdf/pypdf/blob/0dd57738bbdcdb63f0fb43d8a6b3d222b6946595/pypdf/filters.py#L72-L143>
- <https://github.com/py-pdf/pypdf/releases/tag/6.0.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-55197) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_