CVE-2026-47107Public exploitNetwork attack vector

Cross-tenant credential theft via writable resolver files

Published May 19, 2026 · Updated May 19, 2026

Incorrect default permissions in Windmill before 1.703.2 allow remote authenticated users to poison shared worker DNS resolution. The nsjail profiles remount /etc read-only non-recursively, leaving Kubernetes resolver-file submounts writable inside script sandboxes. Script-execution access is required; poisoned entries persist for the worker pod lifetime and can redirect later tenants' traffic or expose workspace tokens.

CVSS severity8.6
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Windmill before 1.703.2 allow remote authenticated users to poison shared worker DNS resolution. The nsjail profiles remount /etc read-only non-recursively, leaving Kubernetes resolver-file submounts writable inside script sandboxes. Script-execution access is required; poisoned entries persist for the worker pod lifetime and can redirect later tenants' traffic or expose workspace tokens.

The record

CVE
CVE-2026-47107
Published
May 19, 2026
Updated
May 19, 2026
Vendor
Windmill Labs
Product
Windmill
Classifications
CWE-276, T1557
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 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=0 <1.703.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Windmill Labs · Windmillversion=0 <1.703.2

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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-276Incorrect Default Permissions
T1557Adversary-in-the-Middle

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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