CVE-2021-26813
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Markdown2
PublishedMar 3, 2021
First seenMar 3, 2021
How to fix
Update
- markdown2_project markdown22.4.0 or later
- markdown22.4.0 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J752422YELXLMLZJPVJVKD2KKHHQRVEH/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRP5RN35JZTSJ3JT4722F447ZDK7LZS5/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JTIX5UXRDJZJ57DO4V33ZNJTNKWGBQLY/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| markdown2_project markdown2 | 1.0.1.18 ≤ v < 2.4.0 | 2.4.0 |
| fedoraproject fedora | 32, 33, 34 | — |
| markdown2PyPI | 1.0.1.18 ≤ v < 2.4.0 | 2.4.0 |
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