CVE-2026-56021

Summary

Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories, due to a bypassable regex pattern.

Affected Software

Weaknesses

• CWE-185: CWE-185 Incorrect Regular Expression
• CWE-777: CWE-777 Regular Expression without Anchors

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://webmin.com/security/#webmin-prior-to-2641
• https://github.com/webmin/webmin/releases/tag/2.641
• https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json
• https://www.cve.org/CVERecord?id=CVE-2026-56021

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