PT-2026-47579

Impact PROXY protocol support for Puma was added in version 5.5.0. When PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer. It waits for "r " to determine whether a PROXY v1 line is present. If an attacker opens a TCP connection and continuously sends bytes...

Allocation of Resources Without Limits or Throttling

Overview puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly concurrent Ruby implementations such as Rubinius and JRuby as well as as providing process...

Puma PROXY Protocol v1 Parser Allows Remote Memory Exhaustion

Impact PROXY protocol support for Puma was added in version 5.5.0. When PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer. It waits for "\r\n" to determine whether a PROXY v1 line is present. If an attacker opens a TCP connection and continuously sends bytes...

Puma PROXY Protocol v1 Accepts Repeated Protocol Headers on Persistent Connections

Impact Puma is vulnerable to source IP spoofing when setremoteaddress proxyprotocol: :v1 is enabled and persistent connections are used. PROXY protocol v1 is a connection-level protocol. Support was added to Puma in v5.5.0. A proxy sends one PROXY header at the beginning of a TCP connection, befo...

Astra Linux – Vulnerability in Puma

Puma is a Ruby/Rack web server designed for parallelism. Prior to versions 6.3.1 and 5.6.7, Puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers, which could allow HTTP request smuggling. The severity of this issue heavily depends ...

Astra Linux – Vulnerability in Puma

Puma is an HTTP 1.1 server for Ruby/Rack applications. The fix for CVE-2019-16770 was incomplete. The original fix only protected existing connections that had already been accepted; it did not prevent new connections from being blocked by greedy persistent-connections that saturated all threads ...

Astra Linux – Vulnerability in Puma

Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, Puma exhibited incorrect behavior when parsing chunked transfer encoding bodies, which allowed HTTP request smuggling. The fixed versions limit the size of chunk extensions. Without this limitation, an...

Astra Linux – Vulnerability in Puma

Puma is an HTTP 1.1 server for Ruby/Rack applications. Prior to versions 5.5.1 and 4.3.9, using “puma” with a proxy that forwards HTTP header values containing the LF character could lead to HTTP request smuggling. A client could secretly send a request through a proxy, causing the proxy to send ...

Astra Linux – Vulnerability in Puma

Puma is a simple, fast, multi-threaded, parallel HTTP 1.1 server for Ruby/Rack applications. When using Puma behind a proxy that does not properly validate that the incoming HTTP requests comply with the RFC7230 standard, Puma and the frontend proxy may disagree about where the requests start and...

Astra Linux – Vulnerability in Puma

Puma is a Ruby/Rack web server designed for parallelism. Prior to version 5.6.2 of Puma, Puma might not always call close on the response body. Before version 7.0.2.2 of Rails, Rails relied on the response body being closed in order for its CurrentAttributes implementation to work correctly. The...

Unity Linux 20.1060e / 20.1070e Security Update: rubygem-puma (UTSA-2026-017528)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017528 advisory. In Puma RubyGem before 4.3.5 and 3.12.6, a client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client. If th...

Unity Linux 20.1060e / 20.1070e Security Update: rubygem-puma (UTSA-2026-017512)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017512 advisory. In Puma RubyGem before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma...

Unity Linux 20.1060e / 20.1070e Security Update: rubygem-puma (UTSA-2026-017658)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017658 advisory. Puma is a concurrent HTTP 1.1 server for Ruby/Rack applications. The fix for CVE-2019-16770 was incomplete. The original fix only protected existing connections that...

ruby4.0-rubygem-puma-6.4.3-1.5 on GA media (moderate)

ruby4.0-rubygem-puma-6.4.3-1.5 on GA media Announcement ID: openSUSE-SU-2026:10357-1 Rating: moderate Cross-References: CVE-2019-16770 CVE-2020-11076 CVE-2022-23634 CVE-2024-45614 CVSS scores: CVE-2019-16770 SUSE : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2020-11076 SUSE : 6.8...

OPENSUSE-SU-2026:10357-1 ruby4.0-rubygem-puma-6.4.3-1.5 on GA media

These are all security issues fixed in the ruby4.0-rubygem-puma-6.4.3-1.5 package on the GA media of openSUSE Tumbleweed...

CVE-2025-63221

The Axel Technology puma devices firmware versions 0.8.5 to 1.0.3 are vulnerable to Broken Access Control due to missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. Unauthenticated remote attackers can list user accounts, create new administrative users, delete users, and modify system...

CVE-2025-63221

The Axel Technology puma devices firmware versions 0.8.5 to 1.0.3 are vulnerable to Broken Access Control due to missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. Unauthenticated remote attackers can list user accounts, create new administrative users, delete users, and modify system...

CVE-2025-63221

The Axel Technology puma devices firmware versions 0.8.5 to 1.0.3 are vulnerable to Broken Access Control due to missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. Unauthenticated remote attackers can list user accounts, create new administrative users, delete users, and modify system...

CVE-2025-63221

CVE-2025-63221 (Axel Technology puma devices) affects firmware versions 0.8.5–1.0.3. The vulnerability is due to broken access control from missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. An unauthenticated remote attacker can enumerate user accounts, create new administrative users...

Axel PUMA 安全漏洞

Axel PUMA is an FM re-broadcast receiver and IP encoder device from Axel Italy. A security vulnerability exists in Axel PUMA versions 0.8.5 through 1.0.3, which stems from a lack of authentication in the /cgi-bin/gstFcgi.fcgi endpoint, and could lead to a complete crack of the device...