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CVE-2026-4867VulnerabilityPublished

argo-workflows · Impact: A bad regular expression is generated any time you have three or more parameters within a single segment

Affects argo-workflowsSource GCVE Database

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Not known to be exploited · CVSS 7.5 High : upgrade to 4.1.6-r1 soon.

Data as of 11 Nov 2026, 04:03 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 4.1.6-r1, 4.0.15-r2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade argo-workflows to 4.1.6-r1; argo-workflows to 4.0.15-r2.

Affected software

ProductAffectedFixed in
CleanStartargo-workflowspkg:apk/cleanstart/argo-workflowsOther threatsAffected
  • <4.1.6-r1
Fixed in
  • 4.1.6-r1
CleanStartargo-workflowspkg:apk/cleanstart/argo-workflowsOther threatsAffected
  • <4.0.15-r2
Fixed in
  • 4.0.15-r2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the official patches by upgrading to argo-workflows versions 4.1.6-r1 or 4.0.15-r2, where this vulnerability has been fixed. Since a patch is available, remediation should be performed promptly to prevent potential availability issues.

Description

A security vulnerability in the argo-workflows package causes the generation of a faulty regular expression when three or more parameters are present within a single segment separated by characters other than a period. This flaw can lead to a high-severity impact on availability. The issue affects versions prior to 4.1.6-r1 and 4.0.15-r2 and has been addressed in these fixed releases.

References

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