CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2021-39207
High (8.8) in facebook parlai. EPSS 1.8% chance of exploitation in the next 30 days. Fixed in parlai 1.1.0.
parlai is a framework for training and evaluating AI models on a variety of openly available dialogue datasets. In affected versions the package is vulnerable to YAML deserialization attack caused by unsafe loading which leads to Arbitary code execution. This security bug is patched by avoiding unsafe loader users should update to version above v1.1.0. If upgrading is not possible then users can change the Loader used to SafeLoader as a workaround. See commit 507d066ef432ea27d3e201da08009872a2f37725 for details.
Severity
- EPSS
- 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
- CWE
- CWE-502
- Published
- Modified
- Record from
- the NVD, synced
Affected
- facebook:parlai
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-m87f-9fvv-2mgg | PyPI | parlai | <1.1.0 | 1.1.0 |
| GHSA-mwgj-7x7j-6966 | PyPI | parlai | <1.1.0 | 1.1.0 |
| PYSEC-2021-330 | PyPI | parlai | <1.1.0 | 1.1.0 |
| PYSEC-2021-334 | PyPI | parlai | <1.1.0 | 1.1.0 |
References
- https://github.com/facebookresearch/ParlAI/commit/4374fa2aba383db6526ab36e939eb1cf8ef99879
- https://github.com/facebookresearch/ParlAI/commit/507d066ef432ea27d3e201da08009872a2f37725
- https://github.com/facebookresearch/ParlAI/security/advisories/GHSA-m87f-9fvv-2mgg
- https://github.com/facebookresearch/ParlAI/commit/4374fa2aba383db6526ab36e939eb1cf8ef99879
- https://github.com/facebookresearch/ParlAI/commit/507d066ef432ea27d3e201da08009872a2f37725