What’s Vulnerable › Vulnerabilities

CVE-2025-46688

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-04-27 · updated 2026-06-17
• Weakness: CWE-131

Description

quickjs-ng through 0.9.0 has an incorrect size calculation in JS_ReadBigInt for a BigInt, leading to a heap-based buffer overflow. QuickJS before 2025-04-26 is also affected.

Affected products

• quickjs-ng quickjs: through 0.9.0
• QuickJS: before 2025-04-26 — fixed in 2025-04-26

How to fix

Upgrade to a fixed version: QuickJS 2025-04-26. Check the vendor advisory for mitigations.

References

• https://bellard.org/quickjs/Changelog
• https://github.com/bellard/quickjs/commit/1eb05e44fad89daafa8ee3eb74b8520b4a37ec9a
• https://github.com/bellard/quickjs/issues/399
• https://github.com/quickjs-ng/quickjs/commit/28fa43d3ddff2c1ba91b6e3a788b2d7ba82d1465
• https://github.com/quickjs-ng/quickjs/issues/1018
• https://github.com/quickjs-ng/quickjs/pull/1020
• https://github.com/quickjs-ng/quickjs/issues/1018

Get alerted when CVE-2025-46688 or the next vulnerability affects your stack