CVE-2025-70560: Boltz 2.0.0 contains an insecure deserialization vulnerability in its molecule loading functionality

Routine

HIGH 8.4DOWNGRADE

CVE-2025-70560 is a high-severity flaw (CVSS 8.4) affecting boltz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jwohlwend

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-03 18:16 UTCPublished CVE record published
2026-06-17 10:03 UTCUpdated Record last modified

jwohlwend boltz DOWNGRADE

Affected: 2.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy boltz || rpm -q boltz || boltz --version

2. No fixed release: DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison boltz sudo apt install boltz=<VERSION_BEFORE_2.0.0> sudo apt-mark hold boltz

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list boltz sudo dnf downgrade boltz-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add boltz

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-70560?

boltz: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-70560 being exploited?

CVE-2025-70560 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-70560 affect?

CVE-2025-70560 affects boltz. Severity is high (CVSS 8.4). 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 maliciou

How urgent is CVE-2025-70560?

Priority 31/100. High severity

Software pages

Python vulnerabilities

References

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