CVE-2025-70560 Boltz contains an insecure deserialization vulnerability in its molecule loading functionality
An attacker can achieve arbitrary code execution by placing a malicious pickle file in a directory processed by the Boltz library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-70560?
CVE-2025-70560 is a high-severity unsafe deserialization vulnerability in n/a, published on 3 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Boltz 2.0.0 contains an insecure deserialization vulnerability in its molecule loading functionality. The application uses Python pickle to deserialize molecule data files without validation. An attacker with the ability to place a malicious pickle file in a directory processed by boltz can achieve arbitrary code execution when the file is loaded.
Weakness: CWE-502
Which versions are affected by CVE-2025-70560?
3 open source packages ship an affected version, including boltz. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
boltz PyPI | All versions to 2.0.0 | None |
boltz PyPI | All versions to 2.0.0 | None |
boltz PyPI | All versions to 2.0.0 | None |
Products include Jwohlwend Boltz.
How do I fix CVE-2025-70560?
No fix has been published for CVE-2025-70560 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-70560 being exploited?
There is no known exploitation of CVE-2025-70560 in the wild and no public exploit code.
Sources
Also known as GHSA-fjm6-8xp2-4fwc, PYSEC-2026-1224.