# CVE-2022-21680: node-marked: Marked is a markdown parser and compiler

CVE-2022-21680 is fixed in node-marked on 1 platform, first by DEBIAN-CVE-2022-21680, released January 14, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-21680
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0298
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 14, 2022

## Description

Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-marked Debian 12.15 (bookworm) | 4.0.12+ds+~4.0.1-1 | [DEBIAN-CVE-2022-21680](https://patchblox.com/security/data/fix/linux/debian-cve-2022-21680.md) | Jan 14, 2022 |
| Linux | node-marked Debian 13.5 (trixie) | 4.0.12+ds+~4.0.1-1 | [DEBIAN-CVE-2022-21680](https://patchblox.com/security/data/fix/linux/debian-cve-2022-21680.md) | Jan 14, 2022 |
| Linux | node-marked Debian 14 | 4.0.12+ds+~4.0.1-1 | [DEBIAN-CVE-2022-21680](https://patchblox.com/security/data/fix/linux/debian-cve-2022-21680.md) | Jan 14, 2022 |

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