Soup Sieve: Regular Expression Denial of Service (ReDoS) via Selector Parser

Summary The CSS selector parser in soupsieve the CSS selector engine for Beautiful Soup 4 contains a regular expression vulnerable to catastrophic backtracking. When processing an attribute selector with an unterminated quoted value, the VALUE regex pattern in cssparser.py enters exponential...

GHSA-2WC2-FM75-P42X Soup Sieve has Memory Exhaustion via Large Comma-Separated Selector Lists

Summary The CSS selector parser in soupsieve the CSS selector engine for Beautiful Soup 4 allocates unbounded memory when compiling large comma-separated selector lists. An attacker who can supply a crafted CSS selector string to soupsieve.compile or Beautiful Soup's .select / .selectone can caus...

PT-2026-56853

Name of the Vulnerable Software and Affected Versions css parser versions prior to 3.0.0 Description An issue exists in the CssParser::Parserread remote file function and related code paths, such as Parserload uri! and Parseradd block!, where the software automatically follows @import URLs withou...

PT-2026-56839

Name of the Vulnerable Software and Affected Versions soupsieve versions prior to 2.8.4 Description The CSS selector parser in soupsieve allocates unbounded memory when compiling large comma-separated selector lists. An attacker can provide a crafted selector string to the soupsieve.compile...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the readremotefile function. An attacker can access internal network resources or disclose arbitrary local files by supplying a crafted CSS file containing a malicious @import url... directive, which...

CVE-2026-44312

A flaw was found in the cssparser Ruby gem prior to 2.1.0 and 1.22.0. When stylesheets are fetched over HTTPS, connections are opened with OpenSSL::SSL::VERIFYNONE, so certificate validation is skipped. A network MITM attacker can present an untrusted certificate and inject or modify CSS returned...

SSRF and Local File Disclosure in `CssParser::Parser#read_remote_file`

Summary CssParser::Parserreadremotefile and therefore loaduri!, and the @import-following branch of addblock! issues HTTP/HTTPS requests against any host, port and URI it is handed, with no scheme allowlist, no host / IP filtering, and no protection against link-local, loopback or RFC‑1918...

SUSE CVE-2026-44312

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

UBUNTU-CVE-2026-44312

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

EUVD-2026-30330

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312 css_parser allows to MITM included https css urls

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312 css_parser allows to MITM included https css urls

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

CVE-2026-44312 css_parser allows to MITM included https css urls

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning...

Ruby CSS Parser 信任管理问题漏洞

Ruby CSS Parser is an open-source tool developed by premailer, used for loading, parsing, and cascading CSS rule sets. Versions of Ruby CSS Parser prior to 2.1.0 and 1.22.0 had a trust management vulnerability. This vulnerability stemmed from unvalidated HTTPS connections, where connections were...

Linux Distros Unpatched Vulnerability : CVE-2026-44312

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to...

GHSA-FF6C-W6QF-7XQC CSS Parser: Improper Certificate Validation allows MITM injection of remote CSS content

Summary The CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning any HTTPS certificate—even entirely untrusted—will...