What is CVE-2024-33263?

CVE-2024-33263 is a medium-severity vulnerability in Bellard Quickjs, classified under Reachable Assertion. CVSS score: 4.0/10. Published 2024-05-14.

How severe is CVE-2024-33263?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in Bellard Quickjs

CVE-2024-33263

QuickJS commit 3b45d15 was discovered to contain an Assertion Failure via JS_FreeRuntime(JSRuntime *) at quickjs.c.

Published 2024-05-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.003 (22.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Bellard Quickjs — versions 2024-03-23

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

github.com/bellard/quickjs/issues/277 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2024-33263?: CVE-2024-33263 is a medium-severity vulnerability in Bellard Quickjs, classified under Reachable Assertion. CVSS score: 4.0/10. Published 2024-05-14.
How severe is CVE-2024-33263?: Medium severity. CVSS v3 base score is 4.0 out of 10.