# CVE-2022-34749: mistune: In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a hig...

CVE-2022-34749 is fixed in mistune on 1 platform, first by DEBIAN-CVE-2022-34749, released July 25, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-34749
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0162
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 2022

## Description

In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mistune Debian 12.15 (bookworm) | 2.0.3-1 | [DEBIAN-CVE-2022-34749](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34749.md) | Jul 25, 2022 |
| Linux | mistune Debian 13.5 (trixie) | 2.0.3-1 | [DEBIAN-CVE-2022-34749](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34749.md) | Jul 25, 2022 |
| Linux | mistune Debian 14 | 2.0.3-1 | [DEBIAN-CVE-2022-34749](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34749.md) | Jul 25, 2022 |

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