# CVE-2025-46687: quickjs: quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer ove...

CVE-2025-46687 is fixed in quickjs on 1 platform, first by DEBIAN-CVE-2025-46687, released April 27, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-46687
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 27, 2025

## Description

quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow. QuickJS before 2025-04-26 is also affected.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | quickjs Debian 13.5 (trixie) | 2025.04.26-1 | [DEBIAN-CVE-2025-46687](https://patchblox.com/security/data/fix/linux/debian-cve-2025-46687.md) | Apr 27, 2025 |
| Linux | quickjs Debian 14 | 2025.04.26-1 | [DEBIAN-CVE-2025-46687](https://patchblox.com/security/data/fix/linux/debian-cve-2025-46687.md) | Apr 27, 2025 |

---

Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.