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CVE-2026-83494
Training-operator: pytorchjob validateupdate casts oldjob from newobj, bypassing managedby immutability (asvs v5.1.3; upstream bug)
Overview
Description

A flaw was found in the training-operator. An incorrect object casting in the PyTorchJob ValidateUpdate webhook allows users to bypass an immutability check. This vulnerability could enable users to detach a queued job from its quota management system or hijack a running job's controller ownership. The primary impact is a Denial of Service (DoS) condition.

Details
INFO

Published Date :

Nov. 6, 2026, 7:17 a.m.

Last Modified :

Nov. 6, 2026, 7:18 a.m.

Remotely Exploit :

No

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-83494 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat openshift_ai
: Total Affected Vendor : 1 | Products : 1
Solution
Update the training-operator to fix the PyTorchJob ValidateUpdate webhook immutability check bypass.
  • Update the training-operator.
  • Apply the immutability check fix.
  • Ensure quota management is enforced.
  • Verify controller ownership integrity.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-83494.

URL Resource
https://access.redhat.com/security/cve/CVE-2026-83494
https://bugzilla.redhat.com/show_bug.cgi?id=2526348
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-83494 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-83494 weaknesses.

CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs Accessing Functionality Not Properly Constrained by ACLs CAPEC-17: Using Malicious Files Using Malicious Files CAPEC-20: Encryption Brute Forcing Encryption Brute Forcing CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-36: Using Unpublished Interfaces or Functionality Using Unpublished Interfaces or Functionality CAPEC-51: Poison Web Service Registry Poison Web Service Registry CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Utilizing REST's Trust in the System Resource to Obtain Sensitive Data CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction CAPEC-65: Sniff Application Code Sniff Application Code CAPEC-74: Manipulating State Manipulating State CAPEC-87: Forceful Browsing Forceful Browsing CAPEC-107: Cross Site Tracing Cross Site Tracing CAPEC-127: Directory Indexing Directory Indexing CAPEC-237: Escaping a Sandbox by Calling Code in Another Language Escaping a Sandbox by Calling Code in Another Language CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content Signature Spoofing by Mixing Signed and Unsigned Content CAPEC-480: Escaping Virtualization Escaping Virtualization CAPEC-668: Key Negotiation of Bluetooth Attack (KNOB) Key Negotiation of Bluetooth Attack (KNOB)

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-83494 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-83494 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Nov. 06, 2026

    Action Type Old Value New Value
    Added Description A flaw was found in the training-operator. An incorrect object casting in the PyTorchJob ValidateUpdate webhook allows users to bypass an immutability check. This vulnerability could enable users to detach a queued job from its quota management system or hijack a running job's controller ownership. The primary impact is a Denial of Service (DoS) condition.
    Added CWE CWE-693
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/83xxx/CVE-2026-83494.json">CVE-2026-83494</a>
    Added Reference https://access.redhat.com/security/cve/CVE-2026-83494
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2526348
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.