CVE-2023-26303
MEDIUM5.5EPSS 0.14%markdown-it-py Denial of Service vulnerability
Published: 2/23/2023Modified: 4/28/2026
Description
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Affected packages (3)
- Debian/markdown-it-pyfrom 0, < 2.1.0-5
- PyPI/markdown-it-pyfrom 0, < 2.2.0
- PyPI/markdown-it-pyfrom 0, < ae03c6107dfa18e648f6fdd1280f5b89092d5d49 | from 0, < 2.2.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References (7)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2023-26303
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2023-26303
- PATCHhttps://github.com/executablebooks/markdown-it-py
- WEBhttps://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c
- WEBhttps://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49
- WEBhttps://github.com/executablebooks/markdown-it-py/pull/246
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml