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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (22.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.7% 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
- Quickjs-Ng Quickjs
- Quickjs Project — versions 0
- Quickjs Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/quickjs-ng/quickjs/issues/1018 (Third Party Advisory)
- github.com/quickjs-ng/quickjs/pull/1020 (Patch)
- github.com/bellard/quickjs/commit/1eb05e44fad89daafa8ee3eb74b8520b4a37ec9a (Patch)
- github.com/quickjs-ng/quickjs/commit/28fa43d3ddff2c1ba91b6e3a788b2d7ba82d1465 (Patch)
- github.com/bellard/quickjs/issues/399 (Exploit, Third Party Advisory)
- bellard.org/quickjs/Changelog (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.