---
cve: "CVE-2026-59937"
severity: "MEDIUM"
cvss: 6.9
epss: "34%"
vendor: "py-pdf"
kev: false
exploited: false
published: "2026-07-08 18:16:34"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T15:23:55+02:00"
---

# CVE-2026-59937

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.

## 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)

- 83cb25f33f41abcbec59e7866e9530b93b7c1ae3 (Commit)
- b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae (Commit)

## Referenzen

- <https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v>
- <https://github.com/py-pdf/pypdf/pull/3887>
- <https://github.com/py-pdf/pypdf/commit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae>
- <https://github.com/py-pdf/pypdf/releases/tag/6.14.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59937) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_