CVE-2025-46687

5.6 MEDIUM 0.3% exploit odds Fix listed Denial of service Library

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine without logging in. Limited direct impact.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2025-04-27 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 09:26 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 5.6 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2025-04-27 20:15 UTC
Last modified: 2026-06-17 09:26 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-770 · Allocation without limits
Record status: Analyzed

Affected

Bellard Quickjs < 2025-04-26
quickjs-ng Quickjs ≤ 0.9.0

Attack profile CVSS 3.1 · 5.6

Attack vector: Local
Complexity: High
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: Low

Raw vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-46687.md and follow it. Check whether this project is affected by CVE-2025-46687. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record