Rack's greedy multipart boundary parsing can cause parser differentials and WAF bypass.

Summary Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermedia...

Permissive Regular Expression

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

Permissive Regular Expression

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

UBUNTU-CVE-2026-34763

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, , or ., the prefix...

CVE-2026-34763 Rack: Rack::Directory info disclosure and DoS via unescaped regex interpolation

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, , or ., the prefix...

Security Bulletin: Inefficient Regex Complexity Vulnerability in brace-expansion Library (CVE-style Security Advisory), affects watsonx.data

Summary A vulnerability in the brace-expansion library versions up to 1.1.11, 2.0.1, 3.0.0, and 4.0.0 affects the expand function, allowing specially crafted input to trigger inefficient regular expression processing. This can lead to excessive CPU usage ReDoS, potentially degrading performance...

PT-2026-29909

Summary Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, , or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem pa...

PT-2026-29810

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.23, 3.1.21, and 3.2.6 Description Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If the root path contains regex metacharacters su...

Rack has a root directory disclosure via unescaped regex interpolation in Rack::Directory

Summary Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, , or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem pa...

Regular Expression Denial of Service (ReDoS)

Overview PraisonAI is a PraisonAI is an AI Agents Framework with Self Reflection. PraisonAI application combines PraisonAI Agents, AutoGen, and CrewAI into a low-code solution for building and managing multi-agent LLM systems, focusing on simplicity, customisation, and efficient human-agent...

EUVD-2026-17903

ByteDance Deer-Flow versions prior to commit 92c7a20 contain a sandbox escape vulnerability in bash tool handling that allows attackers to execute arbitrary commands on the host system by bypassing regex-based validation using shell features such as directory changes and relative paths. Attackers...

PT-2026-29670

Summary The sanitization pipeline for FAQ content is: 1. Filter::filterVar$input, FILTER SANITIZE SPECIAL CHARS — encodes , ", ', & to HTML entities 2. html entity decode$input, ENT QUOTES | ENT HTML5 — decodes entities back to characters 3. Filter::removeAttributes$input — removes dangerous HTML...

ajv: ReDoS via $data reference

A flaw was found in ajv. When the $data option is enabled, the value of the pattern keyword is passed directly to the JavaScript RegExp constructor without sufficient validation. An attacker able to supply a malicious regular expression pattern can trigger a ReDoS Regular Expression Denial of...

Security Bulletin: IBM Maximo Application Suite - Manage Component uses ajv-6.12.6 in multiple applications which is vulnerable CVE-2025-69873

Summary IBM Maximo Application Suite - Manage Component uses ajv-6.12.6 in multiple applications which is vulnerable CVE-2025-69873 Vulnerability Details CVEID:CVE-2025-69873 DESCRIPTION: ajv Another JSON Schema Validator before 8.18.0 is vulnerable to Regular Expression Denial of Service ReDoS...

CVE-2026-33994

A flaw was found in the locutus npm package. A prototype pollution vulnerability exists in the parsestr function. A remote attacker can exploit this by crafting a malicious query string and overriding RegExp.prototype.test, leading to the pollution of Object.prototype. This bypasses existing...

CVE-2026-33994

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Starting in version 2.0.39 and prior to version 3.0.25, a prototype pollution vulnerability exists in the parsestr function of the npm package locutus. An attacker can pollute Object.prototype by...

path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards

Impact When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path. Unsafe examples: /foo-bar-:baz /a-:b-c-:d...

GHSA-27V5-C462-WPQ7 path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards

Impact When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path. Unsafe examples: /foo-bar-:baz /a-:b-c-:d...

CVE-2026-33994

Locutus (npm) in parse_str.js is affected by a prototype-pollution vulnerability in versions 2.0.39 through 3.0.24, due to an incomplete fix for CVE-2026-25521. The attack can pollute Object.prototype by overriding RegExp.prototype.test and supplying a crafted query string, bypassing the guard th...

CVE-2026-33994 Locutus Prototype Pollution due to incomplete fix for CVE-2026-25521

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Starting in version 2.0.39 and prior to version 3.0.25, a prototype pollution vulnerability exists in the parsestr function of the npm package locutus. An attacker can pollute Object.prototype by...