PYSEC-2026-2273
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/ray/PYSEC-2026-2273.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-2273
- Aliases
- Published
- 2026-07-01T17:16:37.390Z
- Modified
- 2026-07-13T07:15:44.097966037Z
- Severity
-
- 8.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 CVSS Calculator
- Summary
- [none]
- Details
-
Ray prior to 2.56.0 contains an unsafe deserialization vulnerability in the WebDataset reader that allows attackers to achieve remote code execution by supplying a malicious tar archive to the readwebdataset() function. The defaultdecoder() function in webdatasetdatasource.py unconditionally calls pickle.loads() on tar entries with .pkl/.pickle extensions and torch.load() with weights_only=False on .pt/.pth entries, executing arbitrary code inside Ray remote workers on every worker that processes the malicious archive.
- References
-
- https://github.com/ray-project/ray/releases/tag/ray-2.56.0
- https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader
- https://github.com/ray-project/ray/pull/63469
- https://github.com/ray-project/ray/pull/63470
- https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43
Affected packages
PyPI / ray
Package
- Name
- ray
- View open source insights on deps.dev
- Purl
- pkg:pypi/ray
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.56.0
Affected versions
0.*
0.1.1
0.1.2
0.2.0
0.2.1
0.2.2
0.3.0
0.3.1
0.4.0
0.5.0
0.5.2
0.5.3
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.7.0
0.7.1
0.7.2
0.7.3
0.7.4
0.7.5
0.7.6
0.7.7
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
1.*
1.0.0
1.0.1
1.1.0
1.2.0
1.3.0
1.4.0
1.4.1
1.5.0
1.5.1
1.5.2
1.6.0
1.7.0
1.7.1
1.8.0
1.9.0
1.9.1
1.9.2
1.10.0
1.11.0
1.11.1
1.12.0
1.12.1
1.13.0
2.*
2.0.0
2.0.1
2.1.0
2.2.0
2.3.0rc0
2.3.0
2.3.1
2.4.0
2.5.0
2.5.1
2.6.0
2.6.1
2.6.2
2.6.3
2.7.0rc0
2.7.0
2.7.1
2.7.2
2.8.0
2.8.1
2.9.0
2.9.1
2.9.2
2.9.3
2.10.0
2.11.0
2.12.0
2.20.0
2.21.0
2.22.0
2.23.0
2.24.0
2.30.0
2.31.0
2.32.0rc0
2.32.0
2.33.0
2.34.0
2.35.0
2.36.0
2.36.1
2.37.0
2.38.0
2.39.0
2.40.0
2.41.0
2.42.0
2.42.1
2.43.0
2.44.0
2.44.1
2.45.0
2.46.0
2.47.0
2.47.1
2.48.0
2.49.0
2.49.1
2.49.2
2.50.0
2.50.1
2.51.0
2.51.1
2.51.2
2.52.0
2.52.1
2.53.0
2.54.0
2.54.1
2.55.0
2.55.1