VDB
CVE-2021-26813
CVE-2021-26813
PUBLISHED
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.
EPSS 0.50% · 66.5th percentile
Risk Scores
EPSS Score
0.50%
66.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:24.04:LTS | python-markdown2 | 2.4.1-1, 2.4.11-1, 0 |
| Ubuntu:22.04:LTS | python-markdown2 | 0, 2.3.10-1.1, 2.4.1-1 |
| Ubuntu:20.04:LTS | python-markdown2 | 2.3.7-2, 0 |
| Ubuntu:25.10 | python-markdown2 | 0, 2.4.11-1 |
Exploit Intelligence
- https://github.com/trentm/python-markdown2/pull/387 (nist-nvd)
- FEDORA-2021-77191478ad (circl)
- FEDORA-2021-0337384e41 (circl)
- FEDORA-2021-e235a0da4a (circl)
Timeline
- Mar 3, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- May 10, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-26813 third-party-advisory
- https://github.com/trentm/python-markdown2/pull/387 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-26813 third-party-advisory