CVE-2021-26813 Common Vulnerabilities and Exposures

Upstream information

CVE-2021-26813 at MITRE

Description

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
CVSS detail	National Vulnerability Database
Base Score	5
Vector	AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector	Network
Access Complexity	Low
Authentication	None
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	Partial

CVSS v3 Scores
CVSS detail	National Vulnerability Database
Base Score	7.5
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	High
CVSSv3 Version	3.1

SUSE Bugzilla entry: 1183171 [IN_PROGRESS]

SUSE Security Advisories:

openSUSE-SU-2021:0429-1, published Tue Mar 16 21:38:43 2021
openSUSE-SU-2021:0451-1, published Sat Mar 20 03:38:01 2021

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Package Hub 15 SP2	`python2-markdown2 >= 2.4.0-bp152.2.4.1` `python3-markdown2 >= 2.4.0-bp152.2.4.1`	Patchnames: openSUSE-2021-451
openSUSE Leap 15.2	`python2-markdown2 >= 2.4.0-lp152.2.3.1` `python3-markdown2 >= 2.4.0-lp152.2.3.1`	Patchnames: openSUSE-2021-429
openSUSE Tumbleweed	`python310-markdown2 >= 2.4.13-1.2` `python311-markdown2 >= 2.4.13-1.2` `python312-markdown2 >= 2.4.13-1.2` `python36-markdown2 >= 2.4.0-2.4` `python38-markdown2 >= 2.4.0-2.4` `python39-markdown2 >= 2.4.0-2.4`	Patchnames: openSUSE-Tumbleweed-2024-11237 openSUSE-Tumbleweed-2024-14146

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s)	Source package	State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP2	python-markdown2	Released

SUSE Timeline for this CVE

CVE page created: Wed Mar 3 18:28:45 2021
CVE page last modified: Thu Dec 11 16:54:08 2025