Buffer overflow in Bellard Quickjs
CVE-2025-12745
A weakness has been identified in QuickJS up to eb2c89087def1829ed99630cb14b549d7a98408c. This affects the function js_array_buffer_slice of the file quickjs.c. This manipulation causes buffer over-read. The attack is restricted to local execution. The exploit has been made available to the public and could be exploited. This product adopts a rolling release strategy to maintain continuous delivery Patch name: c6fe5a98fd3ef3b7064e6e0145dfebfe12449fea. To fix this issue, it is recommended to deploy a patch.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (8.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Bellard Quickjs
- Quickjs — versions eb2c89087def1829ed99630cb14b549d7a98408c
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/bellard/quickjs/issues/451 (issue-tracking, Exploit, Issue Tracking)
- github.com/bellard/quickjs/issues/451 (issue-tracking, Exploit, Issue Tracking)
- github.com/bellard/quickjs/issues/451 (issue-tracking, Exploit, exploit, Issue Tracking)
- github.com/bellard/quickjs/commit/c6fe5a98fd3ef3b7064e6e0145dfebfe12449fea (Patch, patch)
Frequently asked questions
- What is CVE-2025-12745?
- CVE-2025-12745 is a medium-severity vulnerability in Bellard Quickjs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-11-05.
- How severe is CVE-2025-12745?
- Medium severity. CVSS v3 base score is 5.3 out of 10.