What is CVE-2025-46688?

CVE-2025-46688 is a medium-severity vulnerability in Quickjs-ng Quickjs, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.6/10. Published 2025-04-27.

How severe is CVE-2025-46688?

Medium severity. CVSS v3 base score is 5.6 out of 10.

Is CVE-2025-46688 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Quickjs-ng Quickjs

CVE-2025-46688

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.

EPSS: 0.003 (18.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

cve@mitre.org (Third Party Advisory)
cve@mitre.org (Patch)
cve@mitre.org (Patch)
cve@mitre.org (Patch)
cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Product)

Frequently asked questions

What is CVE-2025-46688?: CVE-2025-46688 is a medium-severity vulnerability in Quickjs-ng Quickjs, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.6/10. Published 2025-04-27.
How severe is CVE-2025-46688?: Medium severity. CVSS v3 base score is 5.6 out of 10.
Is CVE-2025-46688 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.