CVE-2026-90777 json
ESPnet before 202609 Remote Code Execution via Unsafe Deserialization
published 2mo ago modified last mo. also EUVD-2026-77001 , GHSA-64f6-3gqc-r926
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository espnet/espnet. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- espnet espnet 202609
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- last mo.
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/espnet/espnet/security/advisories/GHSA-64f6-3gqc-r926 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | 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:X/V:X/RE:X/U:X |
Inferred packages
No advisory lists a package for this vulnerability yet. The CVE names these as products and links their GitHub repository, and the package registry names the same repository, so they are probably the affected packages. Low confidence: the versions are the CVE’s own for the product, and a stack check reports the package as unchecked when there are none.
| ecosystem | package | repository | affected |
|---|---|---|---|
| pypi | espnet | espnet/espnet | no versions given |
Affected products
- espnet espnet
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/espnet/espnet/commit/91ca045fc179f29bc7b7fe05cd852aea65310003
patch
-
github.com
/espnet/espnet/security/advisories/GHSA-64f6-3gqc-r926
vendor-advisory, exploit, advisory
-
github.com
/espnet/espnet/blob/v.202511/espnet2/torch_utils/load_pretrained_model.py#L99
technical-description
-
github.com
/espnet/espnet/releases/tag/v.202609
release-notes
-
github.com
/espnet/espnet
product
-
vulncheck.com
/advisories/espnet-before-202609-remote-code-execution-via-unsafe-deserialization
third-party-advisory
Sources
- CVE List CVE-2026-90777
- NVD CVE-2026-90777
- Maintainer advisory GHSA-64f6-3gqc-r926
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of espnet/espnet published their own advisory on GitHub. Reviewed sources take precedence over it.