CVE-2025-46688

low-risk

Published 2025-04-27

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.

Do I need to act?

0.09% 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

CVSS 5.6/10 Medium

LOCAL / HIGH complexity

Affected Products (2)

Quickjs

Affected Vendors

Quickjs Project Quickjs-Ng

References (7)

Product 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...

Third Party Advisory https://github.com/quickjs-ng/quickjs/issues/1018

Patch https://github.com/quickjs-ng/quickjs/pull/1020

Third Party Advisory https://github.com/quickjs-ng/quickjs/issues/1018

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low-risk

Severity 15/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 7/34 · Low