CVE-2026-57516 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-57516HIGH

Anyscale, Inc Ray — Ray < 2.56.0 Unsafe Deserialization RCE via WebDataset Reader

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   A   H   H   H    8.6   .0055   43.8     —

AFFECTED
  Product  Versions     Fixed
  Ray      unspecified  —

TIMELINE
  Jun 24  Reserved by VulnCheck
  Jul 1   EXPLOIT PUBLISHED — CVE-2026-57516 (Anyscale, Inc Ray). Public exploit reference added.
  Jul 1   Published (CNA: VulnCheck)

CWE-502 · CNA: VulnCheck · CVSS v4.0 · 5 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 24, 2026	Reserved	Reserved by VulnCheck
July 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-57516 (Anyscale, Inc Ray). Public exploit reference added.
July 1, 2026	Published	Published (CNA: VulnCheck)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Anyscale, Inc	Ray	—	—	—

Weaknesses

CWE-502

References (5)

https://github.com/ray-project/ray/pull/63469 [Issue Tracking, Patch]
https://github.com/ray-project/ray/pull/63470 [Issue Tracking, Patch]
https://github.com/ray-project/ray/releases/tag/ray-2.56.0 [Product, Release Notes]
https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43 [Exploit, Mitigation, Patch, Vendor Advisory]
https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader [Third Party Advisory]

Authoritative record: CVE-2026-57516 at cve.org

Vendors: anyscale

Weaknesses: CWE-502

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-57516 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.