CVE-2026-55618
Description
A flaw was found in eml_parser, a Python module for parsing email files. The clean_found_uri function incorrectly validates Uniform Resource Locator (URL) strings by processing them before unescaping HTML entities. This allows a remote attacker to craft malicious URLs using HTML entities that are then improperly rejected and omitted from extracted URL lists. Consequently, email security gateways and Security Operations Center (SOC) pipelines may fail to detect and inspect these hidden malicious links, leading to a bypass of security measures and potential information disclosure.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Access Control,Integrity
Technical Impact: Bypass Protection Mechanism; Execute Unauthorized Code or Commands
An attacker could include dangerous input that bypasses validation protection mechanisms which can be used to launch various attacks including injection attacks, execute arbitrary code or cause other unintended behavior.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
