CVE-2025-46687

low-risk
Published 2025-04-27

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.

Do I need to act?

-
0.10% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.6/10 Medium
LOCAL / HIGH complexity

Affected Products (2)

Quickjs
Quickjs

Affected Vendors

Bellard Quickjs-Ng

References (6)

Release Notes https://bellard.org/quickjs/Changelog
Patch https://github.com/bellard/quickjs/commit/1eb05e44fad89daafa8ee3eb74b8520b4a37ec...
Exploit https://github.com/bellard/quickjs/issues/399
Patch https://github.com/quickjs-ng/quickjs/commit/28fa43d3ddff2c1ba91b6e3a788b2d7ba82...
Exploit https://github.com/quickjs-ng/quickjs/issues/1018
Issue Tracking https://github.com/quickjs-ng/quickjs/pull/1020
22
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low