CVE-2025-58451
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-08

Last updated on: 2025-09-09

Assigner: GitHub, Inc.

Description
Cattown is a JavaScript markdown parser. Versions prior to 1.0.2 used regular expressions with inefficient, potentially exponential worst-case complexity. This could cause excessive CPU usage due to excessive backtracking on crafted inputs. In turn, the excessive CPU usage could lead to resource exhaustion, where processing malicious inputs could cause high CPU or memory usage, potentially leading to denial of service. Version 1.0.2 contains a patch. Additionally, users should review and restrict input sources if untrusted inputs are processed.
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Meta Information
Published
2025-09-08
Last Modified
2025-09-09
Generated
2026-06-16
AI Q&A
2025-09-09
EPSS Evaluated
2026-06-15
NVD
CVE-2025-58451
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
cattown markdown_parser 1.0.2
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
CWE-1333 The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
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Executive Summary

This vulnerability exists in Cattown, a JavaScript markdown parser, where versions prior to 1.0.2 use regular expressions that can have inefficient and potentially exponential worst-case complexity. This inefficiency can cause excessive CPU usage due to excessive backtracking when processing specially crafted inputs, leading to resource exhaustion and potentially causing denial of service.

Impact Analysis

The vulnerability can cause excessive CPU or memory usage when processing malicious inputs, which may lead to resource exhaustion and denial of service. This means that an attacker could disrupt the availability of services relying on the vulnerable markdown parser by sending crafted inputs that trigger high resource consumption.

Mitigation Strategies

Upgrade Cattown to version 1.0.2 or later, which contains a patch for this vulnerability. Additionally, review and restrict input sources to avoid processing untrusted inputs that could trigger excessive CPU usage and potential denial of service.

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