Vulnerability record · CVE-2026-41873 · published 28 April 2026

CVE-2026-41873: Apache pony mail http request smuggling vulnerability

Apache · Pony Mail

** 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.

9.8 CVSS 3.1 Critical EPSS 0.74% · top 47.3% CWE-444 · HTTP request smuggling

9.8CVSS 3.1 base score

0.74%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Pony Mail Apache

References

Link	Tags
https://lists.apache.org/thread/1c7jtxjobh280kqc13fzw1cg57xrz951	Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/28/17

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-41873), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.