CVE-2023-26303
python3-markdown-it: Denial of service could be caused to markdown-it-py, before v2.2.0, if anattacker was allowed to force null assertion...
CVE-2023-26303 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-26303, released February 23, 2023. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.5
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0023
13th percentile
Denial of service could be caused to markdown-it-py, before v2.2.0, if anattacker was allowed to force null assertions with specially crafted input.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| markdown-it-py · Debian 12.15 (bookworm) | 2.1.0-5 | DEBIAN-CVE-2023-26303 | Feb 23, 2023 |
| markdown-it-py · Debian 13.5 (trixie) | 2.1.0-5 | DEBIAN-CVE-2023-26303 | Feb 23, 2023 |
| markdown-it-py · Debian 14 | 2.1.0-5 | DEBIAN-CVE-2023-26303 | Feb 23, 2023 |
| python3-markdown-it · Ubuntu 24.10 (oracular) | 2.1.0-4ubuntu1 | python3-markdown-it 2.1.0-4ubuntu1 | Jan 16, 2026 |
| python3-markdown-it · Ubuntu 25.04 (plucky) | 2.1.0-4ubuntu1 | python3-markdown-it 2.1.0-4ubuntu1 | Jan 16, 2026 |
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