---
cve: "CVE-2026-71870"
severity: "MEDIUM"
cvss: 4.8
epss: "0.1%"
vendor: "py-pdf"
kev: false
exploited: false
published: "2026-08-07 20:16:52"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T18:28:20+02:00"
---

# CVE-2026-71870

> 4.8 MEDIUM · 🧪 PoC

## Beschreibung

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- afba8080e19d29a3c256a742b340995e695b35aa (Commit)
- 7f226a2771da4b71ed0b72d414f0e59d76a3dae9 (Commit)

## Referenzen

- <https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c>
- <https://github.com/py-pdf/pypdf/pull/3944>
- <https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa>
- <https://github.com/py-pdf/pypdf/releases/tag/6.15.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-71870) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_