CVE-2026-56020
Webmin HTTP header authentication bypass
Description
The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. A remote attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.641.
INFO
Published Date :
June 18, 2026, 4:12 p.m.
Last Modified :
June 18, 2026, 4:12 p.m.
Remotely Exploit :
No
Source :
cisa-cg
Affected Products
The following products are affected by CVE-2026-56020
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.
No affected product recoded yet
Solution
- Update Webmin to version 2.641 or later.
- Ensure SSL client certificate validation is correctly configured.
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).
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The following list is the news that have been mention
CVE-2026-56020 vulnerability anywhere in the article.