pypdf-fork

GHSA-h4q8-55c9-m6jj

Malicious code in pypdf-fork (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 6.10.2`

## Source: kam193 (c3a651b0cc8ca7cc4fcae91ff3160af205a97d0aacacd8e88d76c04ce013bd02)
During importing the module, package sends a beacon notification to the owner. The package has no other differences from the original legitimate "pypdf".


---

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.


Campaign: 2026-04-pypdf-fork


Reasons (based on the campaign):


 - clones-real-package

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/pypdf-fork/MAL-2026-2999.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/pypdf-fork
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/pypdf-fork/MAL-2026-2999.json
- https://github.com/advisories/GHSA-h4q8-55c9-m6jj

Compromised versions (1)

= 6.10.2

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.