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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Executable Books | markdown-it-py | < v2.2.0 | v2.2.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | markdown-it-py | 2.1.0-5 | — |
| Debian 13 | markdown-it-py | 2.1.0-5 | — |
| Debian 12 | markdown-it-py | 2.1.0-5 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | markdown-it-py | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-markdown-it-py | 2.2.0-1.1 | openSUSE-SU-2026:12015-1, openSUSE-SU-2024:12772-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | markdown-it-py | < 2.2.0 | 2.2.0 | GHSA-vrjv-mxr7-vjf8 |
Advisories 2
- openSUSE-SU-2026:12015-1 python313-markdown-it-py-4.2.0-1.2 on GA media SUSE / openSUSE Security Updates · Oct 5, 2026
- openSUSE-SU-2024:12772-1 python310-markdown-it-py-2.2.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026