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Vulnerability record · CVE-2026-90777 · published 13 September 2026

CVE-2026-90777: Deserialization of untrusted data vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.73% · top 47.5% CWE-502 · Deserialization of untrusted data Deferred
8.7CVSS 4.0 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
23 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-90777), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.