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TI-2026-41407 Aliases CVE-2026-57516GHSA-hhrp-gw25-jr43

Ray < 2.56.0 Unsafe Deserialization RCE via WebDataset Reader

Priority HIGH 72CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 fixed, 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00858 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Ray (Anyscale, Inc): 2.56.0ray (PyPI): 2.56.0Red Hat: 5 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Anyscale, IncRaybefore 2.56.02.56.0Patch availableCNA
—ray (PyPI)before 2.56.02.56.0Patch availableGHSA-hhrp-gw25-jr43
  • Ray VendorAnyscale, Inc Affected before 2.56.0 Fixed in 2.56.0 Patch available CNA
  • ray (PyPI) Vendor— Affected before 2.56.0 Fixed in 2.56.0 Patch available GHSA-hhrp-gw25-jr43

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:anyscale:ray:*:*:*:*:*:*:*:*before 2.56.0VulnerableAnyscale, Inc
  • cpe:2.3:a:anyscale:ray:*:*:*:*:*:*:*:* Versions before 2.56.0 Vulnerable ·Anyscale, Inc

Remediation

  • Fix · CNA Ray (Anyscale, Inc) Fixed in 2.56.0
  • Fix · GHSA-hhrp-gw25-jr43 ray (PyPI) Fixed in 2.56.0 Advisory →

Red Hat 5 advisories

  • RHSA-2026:92510 Released 2026-10-29 · Red Hat rating Critical
    RHOAI 3.4.6 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-cli-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +47
  • RHSA-2026:76043 Released 2026-10-05 · Red Hat rating Important
    Red Hat Enterprise Linux AI 3.3.7 security update
    • Red Hat Enterprise Linux AI 3.3 registry.redhat.io/rhelai3/disk-image-cuda-rhel9
  • RHSA-2026:76041 Released 2026-10-05 · Red Hat rating Important
    Red Hat Enterprise Linux AI 3.3.7 security update
    • Red Hat Enterprise Linux AI 3.3 registry.redhat.io/rhelai3/bootc-aws-cuda-rhel9, registry.redhat.io/rhelai3/bootc-azure-cuda-rhel9, registry.redhat.io/rhelai3/bootc-azure-rocm-rhel9 +3
Show 2 more Red Hat advisories
  • RHSA-2026:68699 Released 2026-09-17 · Red Hat rating Important
    Red Hat AI Inference Server 3.3.7 (CUDA)
    • Red Hat AI Inference Server 3.3 registry.redhat.io/rhaiis/vllm-cuda-rhel9
  • RHSA-2026:61627 Released 2026-08-31 · Red Hat rating Important
    Red Hat AI Inference Server 3.2.2 (CUDA)
    • Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/vllm-cuda-rhel9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AI Inference ServerAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix planned: Will not fix
Red Hat AI Inference Server 3.2Fixed RHSA-2026:61627
Red Hat AI Inference Server 3.3Fixed RHSA-2026:68699
Red Hat Enterprise Linux AI 3.3Fixed RHSA-2026:76041, RHSA-2026:76043
Red Hat OpenShift AI 3.4Fixed RHSA-2026:92510
Not affected: 3 products
  • Red Hat Enterprise Linux AI 3.3
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift AI 3.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57516
  2. 2026-10-03 Alias added: GHSA-hhrp-gw25-jr43
  3. 2026-10-06 Fix available: RHSA-2026:76043 · Red Hat
  4. 2026-10-06 Fix available: RHSA-2026:76041 · Red Hat
  5. 2026-10-06 Fix available: Red Hat Enterprise Linux AI 3.3 · Red Hat
  6. 2026-10-07 Affected versions changed · Red Hat
  7. 2026-10-30 Fix available: RHSA-2026:92510 · Red Hat
  8. 2026-10-30 Fix available: Red Hat OpenShift AI 3.4 · Red Hat

References

Exploit 1

Patch 2

Advisory 1

Other 4

  • TI-2025-38808 Ray is vulnerable to RCE via Safari & Firefox Browsers through DNS Rebinding Attack KEVCVSS 4.0CRITICAL 9.4
  • TI-2023-26002 Anyscale Ray 2.6.3 and 2.8.0 allows a remote attacker to execute arbitrary code via the… CVSS 3.1CRITICAL 9.8
  • TI-2023-26003 Anyscale Ray 2.6.3 and 2.8.0 allows /log_proxy SSRF. CVSS 3.1CRITICAL 9.1
  • TI-2026-25429 Ray Dashboard <= 2.8.0 Path Traversal Leading to Local File Disclosure CVSS 4.0HIGH 8.7
  • TI-2026-21889 Ray: Dashboard DELETE endpoints allow unauthenticated browser-triggered DoS (Serve shutdown / job deletion) CVSS 3.1MEDIUM 6.5
  • TI-2026-30073 Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization CVSS 4.0HIGH 8.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences