Back to overview

CVE-2026-57516

HIGH Exploitation: PoC
8.8
CVSS 3.1
Description
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 read_webdataset() function. The _default_decoder() function in webdataset_datasource.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.

Metadata

CVE ID
CVE-2026-57516
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-24 15:58 UTC
Published
2026-07-01 16:36 UTC
Last updated
2026-07-01 17:53 UTC
Primary CWE
CWE-502
Deserialization of Untrusted Data
Vendor / Product
Anyscale, Inc / Ray
Sources
cve.org  ·  NVD

Severity & Metrics

8.8 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Anyscale, Inc Ray — 0 < 2.56.0
Weakness (CWE)
CWESourceDescription
CWE-502 cna Deserialization of Untrusted Data
CVSS scores (2)
ScoreSeverityVersionSourceVector
8.8 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.6 HIGH 4.0 cna 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
References (5)
Back to overview