CVE-2026-113728 Bulwark Webmail - Server Side Request Forgery

Bulwark Webmail < 1.9.2 contains a server-side request forgery caused by DNS rebinding in hostname validation and fetch logic, letting attackers retrieve internal HTTP/HTTPS responses, exploit requires attacker-controlled authoritative DNS.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
Server Side Request Forgery
Impact
Server Side Request Forgery, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
20 October 2026
Updated
21 October 2026
Weakness
CWE-918

Vendor fix

Update to version 1.9.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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