Security Bulletin: Incomplete Security Scanner Blocklist Enables Network-Based Code Execution

Summary A security vulnerability was identified in the code security scanner where the DANGEROUSIMPORTS blocklist incompletely addressed network-based code execution risks. While subprocess module imports were correctly blocked, socket and urllib standard library modules were omitted from the...

CVE-2026-2020-SSRF-via-URL-Parser-Differential

CVE-2026-2020 – SSRF mediante diferencia de analizadores de URL Código del programa Python root@kitploit: vulnerableservice.py - Validates URL with urllib.parse, fetches with requests from flask import Flask, request import requests import urllib.parse app = Flaskname def isallowedurlurl: parsed ...

CVE-2023-24329-PoC

CVE-2023-24329-PoC Un PoC corto e informativo sobre CVE-2023-24329: fallo en el análisis de urllib de Python. root@kitploit: git clone https://github.com/H4R335HR/CVE-2023-24329-PoC cd CVE-2023-24329-PoC python3 CVE-2023-24329-PoC.py Basado en la investigación de Yebo Cao -...

BIT-PYTHON-MIN-2026-15806 `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching

The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also us...

PT-2026-84049

Name of the Vulnerable Software and Affected Versions Tornado versions prior to 6.5.8 Description Tornado parses application/x-www-form-urlencoded request bodies using urllib.parse.parse qs in tornado/escape.py without specifying the max num fields parameter. The process occurs within...

CVE-2026-55553

A flaw was found in urllib. This HTTP client for Node.js can be exploited by a remote attacker due to improper handling of cross-origin redirects. When following redirects, urllib reuses sensitive request headers, such as Authorization and Cookie, across different origins. This can lead to the...

CVE-2026-55553

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

urllib's cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

Summary urllib supports redirect-following through followRedirect, which is expected behavior for an HTTP client. The issue is that, when following a redirect to a different origin, urllib preserves the caller-supplied request headers verbatim, including credential-bearing headers such as...

EUVD-2026-65613

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

CVE-2026-55553 urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

CVE-2026-55553

urllib is an HTTP client for Node.js. Prior to versions 2.44.1 and 4.9.1 , its redirect-following logic in src/HttpClient.ts reuses caller-supplied options across origin boundaries. When #requestInternal recursively processes a redirect to a different scheme, host, or port, headers such as Author...

CVE-2026-55553 urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, requestInternal recursively calls...

Astra Linux – Vulnerability in Python 3.7, Python 2.7

There is a flaw in the urllib’s AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server to which an HTTP client such as a web browser connects can trigger a Regular Expression Denial of Service ReDOS during an authentication request. This occurs when the server sends a...

Astra Linux – Vulnerability in python-django, python2.7

Packages containing “python/cpython” from versions 0 and earlier, including 3.6.13, 3.7.0 and earlier than 3.7.10, 3.8.0 and earlier than 3.8.8, 3.9.0 and earlier than 3.9.2, are vulnerable to Web Cache Poisoning via “urllib.parse.parseqsl” and “urllib.parse.parseqs”. This vulnerability occurs du...

Astra Linux – Vulnerability in Pypy

Python versions 2.7.x through 2.7.16, and 3.x through 3.7.2 are affected by improper handling of Unicode encoding with an incorrect netloc during NFKC normalization. The impact is information disclosure—credentials, cookies, etc., that are cached against a given hostname. The affected components...

CVE-2026-15806

The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also us...

DEBIAN-CVE-2026-15806

The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also us...

CVE-2026-15806

The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also us...

CVE-2026-67201 V 0.5.2 SSRF Bypass via Parser Differential in net.urllib and net.http

V through 0.5.2, fixed in commit 85859f0, contains a server-side request forgery SSRF bypass vulnerability that allows attackers to circumvent host-based allowlists by exploiting a parser differential between net.urllib and net.http. Attackers can craft a URL containing a backslash in the authori...

CVE-2026-67201

CVE-2026-67201 describes a SSRF bypass in V’s standard library between net.urllib and net.http up to version 0.5.2. By crafting a URL with a backslash in the authority section, net.urllib.parse() can extract a trusted host for allowlists, while net.http.get() normalizes the backslash and connects...