PyPi: Markdown2

CVE-2021-26813

Safety vulnerability ID: 39670

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at Mar 03, 2021 Updated at Mar 29, 2024

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Advisory

Markdown2 2.4.0 includes a fix for CVE-2021-26813: markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.

Affected package

markdown2

Latest version: 2.4.13

A fast and complete Python implementation of Markdown

Affected versions

Fixed versions

Vulnerability changelog

markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time. See CVE-2021-26813.

MISC:https://github.com/trentm/python-markdown2/pull/387: https://github.com/trentm/python-markdown2/pull/387

Resources

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Severity Details

CVSS Base Score

HIGH 7.5

CVSS v3 Details

HIGH 7.5

Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality Impact (C): NONE
Integrity Impact (I): NONE
Availability Availability (A): HIGH

CVSS v2 Details

MEDIUM 5.0

Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (Au): NONE
Confidentiality Impact (C): NONE
Integrity Impact (I): NONE
Availability Impact (A): PARTIAL