[Falkon] [Bug 505525] New: Link-local IPv6 addresses are malformed

xHire bugzilla_noreply at kde.org
Thu Jun 12 15:35:13 BST 2025


https://bugs.kde.org/show_bug.cgi?id=505525

            Bug ID: 505525
           Summary: Link-local IPv6 addresses are malformed
    Classification: Applications
           Product: Falkon
      Version First unspecified
       Reported In:
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: kde-bugs at mujmalysvet.cz
  Target Milestone: ---

SUMMARY
Link-local IPv6 addresses can be used only in combination with a specific
ntework interface (because normal routing is not applicable in their context).
This is accomplished by appending the interface name to the address, delimited
with %. However, falkon encodes %, despite it being part of the IPv6 address.

STEPS TO REPRODUCE
1. Enter http://[fe80::9c33:c1fb:66b2:cb65%eth0]/ to the address bar and press
Enter.

OBSERVED RESULT
The address changes to `http://[fe80::9c33:c1fb:66b2:cb65%25eth0]/` and the
attempt to access it fails.

EXPECTED RESULT
The address to remain `http://[fe80::9c33:c1fb:66b2:cb65%eth0]/`. The % within
[] must not be altered.

SOFTWARE/OS VERSIONS
Falkon Version: 24.12.3 (according to the change log, the problem should still
occur in the latest version)
Qt Version: 6.8.3

ADDITIONAL INFORMATION
If you wonder why this is important, it is crucial for accessing routers, for
example.

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