Deserialization in Espnet
CVE-2026-90777
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (54.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/espnet/espnet/security/advisories/GHSA-64f6-3gqc-r926 (vendor-advisory)
- github.com/espnet/espnet/commit/91ca045fc179f29bc7b7fe05cd852aea65310003 (patch)
- github.com/espnet/espnet/blob/v.202511/espnet2/torch_utils/load_pretrained_mode… (technical-description)
- github.com/espnet/espnet/releases/tag/v.202609 (release-notes)
- github.com/espnet/espnet (product)
- www.vulncheck.com/advisories/espnet-before-202609-remote-code-execution-via-uns… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90777?
- CVE-2026-90777 is a high-severity vulnerability in Espnet, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-13.
- How severe is CVE-2026-90777?
- High severity. CVSS v3 base score is 8.8 out of 10.