CVE-2026-41873 PUBLISHED

Pony Mail: Admin account takeover via request smuggling

Assigner: apache
Reserved: 22.04.2026 Published: 28.04.2026 Updated: 28.04.2026

** UNSUPPORTED WHEN ASSIGNED ** Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Pony Mail leading to admin account takeover.

This issue affects all versions of the Lua implementation of Pony Mail. There is a Python implementation under development under the name "Pony Mail Foal" that is not affected by this issue, but hasn't been released yet.

As the Lua implementation of this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.

NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Product Status

Vendor Apache Software Foundation
Product Pony Mail
Versions Default: unaffected
  • affected from 0 to * (incl.)

Credits

  • Li Jiantao (@CurseRed) of STAR Labs SG Pte. Ltd. (@starlabs_sg) finder
  • Tevel Sho of STAR Labs SG Pte. Ltd finder

References

Problem Types

  • CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') CWE