Mailpit has an SMTP Header Injection via Regex Bypass

Vulnerability Report: SMTP Header Injection via Regex Bypass Vulnerable Code: mailpit/internal/smtpd/smtpd.go Executive Summary Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate RCPT TO and MAIL FROM addresses. An attacker can injec...

MiracleLinux 9 : ruby:3.3 (AXSA:2024-8491:01)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-8491:01 advisory. ruby: Buffer overread vulnerability in StringIO CVE-2024-27280 ruby: RCE vulnerability with .rdocoptions in RDoc CVE-2024-27281 ruby: Arbitrary memo...

MiracleLinux 9 : golang-1.18.9-1.el9, go-toolset-1.18.9-1.el9 (AXSA:2023-4904:01)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2023-4904:01 advisory. golang: archive/tar: unbounded memory consumption when reading headers CVE-2022-2879 golang: net/http/httputil: ReverseProxy should not forward...

MiracleLinux 7 : java-1.7.0-openjdk-1.7.0.261-2.6.22.2.0.1.el7.AXS7 (AXSA:2020-029:05)

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2020-029:05 advisory. OpenJDK: Incorrect bounds checks in NIO Buffers Libraries, 8234841 CVE-2020-2803 OpenJDK: Incorrect type checks in MethodType.readObject Libraries,...

MiracleLinux 8 : ruby:3.0 (AXSA:2024-8502:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-8502:01 advisory. ruby/cgi-gem: HTTP response splitting in CGI CVE-2021-33621 ruby: ReDoS vulnerability in URI CVE-2023-28755 ruby: ReDoS vulnerability in Time...

MiracleLinux 4 : java-1.7.0-openjdk-1.7.0.261-2.6.22.1.AXS4 (AXSA:2020-002:03)

The remote MiracleLinux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2020-002:03 advisory. OpenJDK: Incorrect bounds checks in NIO Buffers Libraries, 8234841 CVE-2020-2803 OpenJDK: Incorrect type checks in MethodType.readObject Libraries,...

MiracleLinux 8 : ruby:2.5 (AXSA:2024-8560:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-8560:01 advisory. rubygem-uri: ReDoS vulnerability - upstream's incomplete fix for CVE-2023-28755 CVE-2023-36617 ruby: Buffer overread vulnerability in StringIO...

MiracleLinux 8 : perl-5.26.3-419.el8 (AXSA:2021-2044:27)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2021-2044:27 advisory. perl: heap-based buffer overflow in regular expression compiler leads to DoS CVE-2020-10543 perl: corruption of intermediate language state of...

MiracleLinux 9 : nodejs-nodemon-2.0.20-3.el9, nodejs-16.19.1-1.el9 (AXSA:2023-6037:02)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2023-6037:02 advisory. c-ares: buffer overflow in configsortlist due to missing string length check CVE-2022-4904 http-cache-semantics: Regular Expression Denial of Servic...

MiracleLinux 8 : ruby:3.1 (AXSA:2024-8503:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-8503:01 advisory. ruby: RCE vulnerability with .rdocoptions in RDoc CVE-2024-27281 ruby: Buffer overread vulnerability in StringIO CVE-2024-27280 ruby: Arbitrary memo...

CVE-2026-23829

Mailpit is an email testing tool and API for developers. Prior to version 1.28.3, Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate RCPT TO and MAIL FROM addresses. An attacker can inject arbitrary SMTP headers or corrupt existing...

MiracleLinux 7 : postgresql-9.2.15-1.el7 (AXSA:2016-121:01)

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2016-121:01 advisory. PostgreSQL is an advanced Object-Relational database management system DBMS. The base postgresql package contains the client programs that you'll need to acce...

CVE-2026-23829

CVE-2026-23829 — Mailpit SMTP header injection via regex bypass. Mailpit’s SMTP server (prior to v1.28.3) fails to properly filter control characters in RCPT TO/MAIL FROM addresses due to a regex with an incomplete character class, allowing CR/LF bypass and header injection. The flaw stems from G...

CVE-2026-23829 Mailpit has SMTP Header Injection via Regex Bypass

Mailpit is an email testing tool and API for developers. Prior to version 1.28.3, Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate RCPT TO and MAIL FROM addresses. An attacker can inject arbitrary SMTP headers or corrupt existing...

CVE-2026-23829 Mailpit has SMTP Header Injection via Regex Bypass

Mailpit is an email testing tool and API for developers. Prior to version 1.28.3, Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate RCPT TO and MAIL FROM addresses. An attacker can inject arbitrary SMTP headers or corrupt existing...

PT-2026-3406

Name of the Vulnerable Software and Affected Versions Mailpit versions prior to 1.28 Description Mailpit, an email testing tool and API for developers, has a header injection issue in its SMTP server. This is due to a flawed regular expression used to validate RCPT TO and MAIL FROM addresses,...

MiracleLinux 4 : bind-9.8.2-0.17.4.0.1rc1.AXS4 (AXSA:2013-318:03)

"The remote MiracleLinux 4 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2013-318:03 advisory. BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names ...

MiracleLinux 7 : grep-2.20-2.el7 (AXSA:2015-669:01)

The remote MiracleLinux 7 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2015-669:01 advisory. The GNU versions of commonly used grep utilities. Grep searches through textual input for lines which contain a match to a specified pattern and then prints t...

MiracleLinux 7 : rh-postgresql94-postgresql-9.4.6-1.el7 (AXSA:2016-122:01)

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2016-122:01 advisory. PostgreSQL is an advanced Object-Relational database management system DBMS. The base postgresql package contains the client programs that you'll need to acce...

MiracleLinux 4 : rh-postgresql94-postgresql-9.4.6-1.AXS4 (AXSA:2016-124:01)

The remote MiracleLinux 4 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2016-124:01 advisory. PostgreSQL is an advanced Object-Relational database management system DBMS. The base postgresql package contains the client programs that you'll need to acce...