CVE-2026-31217: The _load_model() function in the neural_magic_training.py script of the optimate project in commit a6d302f912

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2026-31217 is a critical-severity flaw (CVSS 9.8) affecting optimate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The _load_model() function in the neural_magic_training.py script of the optimate project in commit a6d302f912b481c94370811af6b11402f51d377f (2024-07-21) allows arbitrary code execution. When a user supplies a directory path via the --model command-line argument, the function reads a module.py file from that directory and executes its contents directly using Python's exec() function. This design does not validate or sanitize the file's content, a

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-05-12
Last modified	2026-10-19

Publisher (CNA): MITRE · Vendor: nebuly

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-12 16:16 UTCPublished CVE record published
2026-10-19 22:10 UTCUpdated Record last modified

nebuly optimate DOWNGRADE

Affected: 2024-07-21

Fixed in: no fixed release known

Safe to downgrade to: a release before 2024-07-21

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2024-07-21 (Debian / Ubuntu)

apt-cache madison optimate sudo apt install optimate=<VERSION_BEFORE_2024-07-21> sudo apt-mark hold optimate

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

dnf --showduplicates list optimate sudo dnf downgrade optimate-<VERSION_BEFORE_2024-07-21> sudo dnf versionlock add optimate

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-2026-31217?

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

Is CVE-2026-31217 being exploited?

CVE-2026-31217 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-2026-31217 affect?

CVE-2026-31217 affects optimate. Severity is critical (CVSS 9.8). The _load_model() function in the neural_magic_training.py script of the optimate project in commit a6d302f912b481c94370811af6b11402f51d377f (2024-07-21) allows arbitrary code execution. When a user supplies a directory path via the --model

How urgent is CVE-2026-31217?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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