CVE WatchJul 15, 2026

CVE-2026-49477

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contain

CVSS

7.5

High

EPSS

0.6%

p45

KEV

—

Exploit Today

0-100

Published: Jul 14, 2026 · Last modified: Jul 15, 2026 · CWE-400 · CWE-1333

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-07-152026-07-17

Technical description

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2025-594657.5 HIG

88.8%

——27A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` error `ECONNRESET`. Instead of safely closing the connection, the process crashes, enabling a remote denial of service. This primarily affects applications that do not attach explicit error handlers to secure sockets, for example: ``` server.on('secureConnection', socket => { socket.on('error', err => { console.log(err) }) }) ```3d CVE-2026-238647.5 HIG

82.9%

——25Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack. The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.3d CVE-2026-455917.5 HIG

82.4%

——25Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.3d CVE-2026-331167.5 HIG

80.0%

——24Loop with unreachable exit condition ('infinite loop') in .NET, .NET Framework, Visual Studio allows an unauthorized attacker to deny service over a network.3d CVE-2026-465227.5 HIG

76.7%

——23ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2.23 and 6.9.13-48, due to a missing check in the MIFF decoder, a crafted file could cause an infinite loop resulting in CPU exhaustion. Versions 7.1.2.23 and 6.9.13-48 fix the issue.3d CVE-2026-261717.5 HIG

75.4%

——23Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.3d