# CVE-2020-17354: lilypond: LilyPond before 2.24 allows attackers to bypass the -dsafe protection mechanism via output-def-lookup or output-def-s...

CVE-2020-17354 is fixed in lilypond on 1 platform, first by DEBIAN-CVE-2020-17354, released April 15, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-17354
- Priority: High
- CVSS: 8.6 (high)
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 15, 2023

## Description

LilyPond before 2.24 allows attackers to bypass the -dsafe protection mechanism via output-def-lookup or output-def-scope, as demonstrated by dangerous Scheme code in a .ly file that causes arbitrary code execution during conversion to a different file format. NOTE: in 2.24 and later versions, safe mode is removed, and the product no longer tries to block code execution when external files are used.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | lilypond Debian 12.15 (bookworm) | 2.22.1-1 | [DEBIAN-CVE-2020-17354](https://patchblox.com/security/data/fix/linux/debian-cve-2020-17354.md) | Apr 15, 2023 |
| Linux | lilypond Debian 13.5 (trixie) | 2.22.1-1 | [DEBIAN-CVE-2020-17354](https://patchblox.com/security/data/fix/linux/debian-cve-2020-17354.md) | Apr 15, 2023 |
| Linux | lilypond Debian 14 | 2.22.1-1 | [DEBIAN-CVE-2020-17354](https://patchblox.com/security/data/fix/linux/debian-cve-2020-17354.md) | Apr 15, 2023 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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