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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.

PUBLISHED Reserved 2026-04-22 | Published 2026-04-28 | Updated 2026-04-29 | Assigner apache

Problem types

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

Product status

Default status
unaffected

Any version
affected

Credits

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

Tevel Sho of STAR Labs SG Pte. Ltd finder

References

www.openwall.com/lists/oss-security/2026/04/28/17

lists.apache.org/thread/1c7jtxjobh280kqc13fzw1cg57xrz951 vendor-advisory

cve.org (CVE-2026-41873)

nvd.nist.gov (CVE-2026-41873)

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