Unexpected HTTP/HTTPS Prefix in Subdomain Enumeration Results #1152
Labels
investigation
investigation
Type: Bug
Inconsistencies or issues which will cause an issue or problem for users or implementors.
Describe the bug
During a routine subdomain enumeration using Subfinder, I encountered an unusual behavior where some of the enumerated subdomains were prefixed with
http://
and one withhttp
, which deviates from the expected format. This issue was observed in a small subset of the results (6 out of 4826 subdomains). Typically, Subfinder outputs subdomains in a plain text format without any protocol prefixes. The unexpected inclusion ofhttp://
andhttp
in the subdomain names could potentially affect downstream processing or analysis of the enumeration data.Subfinder version
v2.6.5
Complete command you used to reproduce this
Expected behavior
Subdomains should be listed without any HTTP/HTTPS prefixes, adhering to the format
subdomain.domain.com.pages.services,[source]
. For instance:Actual Results
A few subdomains were listed with an unexpected
http://
prefix and one with an incorrecthttp
prefix:Additional context
This is the first time I've encountered this issue despite using Subfinder for an extended period. The bug only appeared on 6 subdomains out of 4826 in the results, which suggests it might be a rare or conditional occurrence.
Screenshots
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