CVE-2026-90777 ESPnet before 202609 Remote Code Execution via Unsafe Deserialization
Attackers can execute arbitrary code by supplying malicious model checkpoints to ESPnet due to unsafe deserialization practices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-90777?
CVE-2026-90777 is a high-severity unsafe deserialization vulnerability in espnet, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
ESPnet before 202609 deserializes pretrained model checkpoints using torch.load with weights_only=False, allowing arbitrary code execution from attacker-supplied files. Attackers can craft malicious checkpoint files that execute code during deserialization when loaded through the initialization or fine-tuning path.
Weakness: CWE-502
Which versions are affected by CVE-2026-90777?
How do I fix CVE-2026-90777?
No fix has been published for CVE-2026-90777 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-2026-90777 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90777 exists.
Sources
Also known as GHSA-64f6-3gqc-r926, GHSA-r7rw-fc94-3p58.