What’s Vulnerable › Vulnerabilities

CVE-2026-90777: ESPnet before 202609 Remote Code Execution via Unsafe Deserialization

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-13 · updated 2026-09-23
• Weakness: CWE-502

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.

Affected products

• espnet: before 202609 — fixed in 202609

How to fix

Upgrade to a fixed version: espnet 202609. Check the vendor advisory for mitigations.

References

• https://github.com/espnet/espnet
• https://github.com/espnet/espnet/blob/v.202511/espnet2/torch_utils/load_pretrained_model.py#L99
• https://github.com/espnet/espnet/commit/91ca045fc179f29bc7b7fe05cd852aea65310003
• https://github.com/espnet/espnet/releases/tag/v.202609
• https://github.com/espnet/espnet/security/advisories/GHSA-64f6-3gqc-r926
• https://www.vulncheck.com/advisories/espnet-before-202609-remote-code-execution-via-unsafe-deserialization
• https://github.com/espnet/espnet/security/advisories/GHSA-64f6-3gqc-r926

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