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Admin account takeover via request smuggling

CVE-2026-41873 [CVE] [CVE json] [OSV json]

Last updated: 2026-04-28T15:18:49.753Z

Affected

• Pony Mail through *

Description

** 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.

References

• https://lists.apache.org/thread/1c7jtxjobh280kqc13fzw1cg57xrz951

Credits

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