CVE-2026-27590 Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because...

CVE-2026-27590 Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because...

CVE-2026-27590: Improper Input Validation

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: fcgi (UTSA-2026-005213)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005213 advisory. FastCGI fcgi2 aka fcgi 2.x through 2.4.4 has an integer overflow and resultant heap-based buffer overflow via crafted nameLen or valueLen values in data to the IPC...

MiracleLinux 8 : php:8.2 (AXSA:2024-9505:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-9505:01 advisory. php: host/secure cookie bypass due to partial CVE-2022-31629 fix CVE-2024-2756 php: passwordverify can erroneously return true, opening ATO risk...

MiracleLinux 9 : haproxy-2.4.22-1.el9 (AXSA:2023-6671:04)

The remote MiracleLinux 9 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2023-6671:04 advisory. haproxy: data leak via fcgi requests CVE-2023-0836 Tenable has extracted the preceding description block directly from the MiracleLinux security advisory. No...

MiracleLinux 8 : perl-FCGI:0.78 (AXSA:2025-10019:01)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2025-10019:01 advisory. perl-fcgi: FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 aka fcgi library CVE-2025-40907 Tenable has extracte...

MiracleLinux 8 : perl-FCGI:0.78 (AXSA:2025-10018:01)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2025-10018:01 advisory. perl-fcgi: FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 aka fcgi library CVE-2025-40907 Tenable has extracte...

MiracleLinux 8 : perl-FCGI:0.78 (AXSA:2025-10017:01)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2025-10017:01 advisory. perl-fcgi: FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 aka fcgi library CVE-2025-40907 Tenable has extracte...

CVE-2009-4230

Multiple stack-based buffer overflows in src/Task.cc in the FastCGI program in IIPImage Server before 0.9.8 might allow remote attackers to execute arbitrary code via vectors associated with crafted arguments to the 1 RGN::run, 2 JTLS::run, or 3 SHD::run function. NOTE: some of these details are...

CVE-2025-23016

FastCGI fcgi2 aka fcgi 2.x through 2.4.4 has an integer overflow and resultant heap-based buffer overflow via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c...

PT-2026-21775

Name of the Vulnerable Software and Affected Versions Caddy versions prior to 2.11.1 FrankenPHP versions prior to 1.11.2 Description Caddy and FrankenPHP are vulnerable to a path confusion issue due to incorrect handling of Unicode characters during case conversion in the FastCGI path splitting...

OESA-2025-2779 fcgi security update

FastCGI is a language independent, scalable, open extension to CGI that provides high performance without the limitations of server specific APIs. Security Fixes: FastCGI fcgi2 aka fcgi 2.x through 2.4.4 has an integer overflow and resultant heap-based buffer overflow via crafted nameLen or...

[SECURITY] Fedora 42 Update: fcgi-2.4.7-1.fc42

FastCGI is a language independent, scalable, open extension to CGI that provides high performance without the limitations of server specific APIs...

[SECURITY] Fedora 41 Update: fcgi-2.4.7-1.fc41

FastCGI is a language independent, scalable, open extension to CGI that provides high performance without the limitations of server specific APIs...

[SECURITY] Fedora 43 Update: fcgi-2.4.7-1.fc43

FastCGI is a language independent, scalable, open extension to CGI that provides high performance without the limitations of server specific APIs...

Fedora 43 : fcgi (2025-93042e260c)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-93042e260c advisory. 2.4.7 release, fixes CVE-2025-23016 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has no...

TencentOS Server 4: perl-FCGI (TSSA-2025:0476)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0476 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities...

TencentOS Server 4: fcgi (TSSA-2025:0422)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2025:0422 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

Mageia: Security Advisory (MGASA-2025-0277)

The remote host is missing an update for the SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...