CVE-2026-47237Public exploitNetwork attack vector

Authenticated session token theft via writable Istio routes

Published Jul 21, 2026 · Updated Jul 21, 2026

Incorrect privilege assignment in Kubeflow Community Distribution before 26.03-rc.1 allows remote authenticated users to steal session tokens. The kubeflow-edit ClusterRole grants write access to networking.istio.io, letting a namespace contributor bind a crafted VirtualService to the shared Kubeflow Gateway and route a browser-loaded asset to an attacker-controlled pod. Contributor access in any namespace, or authenticated access when Automatic Profile Creation is enabled, is sufficient; a victim must load the routed asset, exposing the session cookie and permitting account and data takeover.

CVSS severity8.0
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect privilege assignment in Kubeflow Community Distribution before 26.03-rc.1 allows remote authenticated users to steal session tokens. The kubeflow-edit ClusterRole grants write access to networking.istio.io, letting a namespace contributor bind a crafted VirtualService to the shared Kubeflow Gateway and route a browser-loaded asset to an attacker-controlled pod. Contributor access in any namespace, or authenticated access when Automatic Profile Creation is enabled, is sufficient; a victim must load the routed asset, exposing the session cookie and permitting account and data takeover.

The record

CVE
CVE-2026-47237
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Kubeflow
Product
Kubeflow Community Distribution
Classifications
CWE-266, T1557, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 26.03-rc.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kubeflow · Kubeflow Community Distributionversion=< 26.03-rc.1

Published CVSS scores

8.0GitHubCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
T1557Adversary-in-the-Middle
T1539Steal Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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