---
cve: "CVE-2026-113793"
severity: "MEDIUM"
cvss: 6.0
epss: "0.4%"
vendor: "py-pdf"
kev: false
exploited: false
published: "2026-10-21 16:17:27"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-11-10T00:51:33+01:00"
---

# CVE-2026-113793

> 6.0 MEDIUM · 🧪 PoC

## Beschreibung

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-10-28 17:01:30
- CNA-CVSS: **6.0** (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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 |

## Schwachstellen-Klasse

- **CWE-835** — Loop with Unreachable Exit Condition
  The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

## Patch verfügbar (OSV)

- 628c06057308b76a21cc9779df601c7a321399fb (Commit)
- c9c35b4471c2eb5fe078094f6c816e69d4ed25a0 (Commit)

## Referenzen

- <https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p>
- <https://github.com/py-pdf/pypdf/pull/4188>
- <https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0>
- <https://github.com/py-pdf/pypdf/releases/tag/6.20.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-113793/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_