What is CVE-2026-1145?

CVE-2026-1145 is a medium-severity vulnerability in Quickjs-Ng Quickjs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.3/10. Published 2026-01-19.

How severe is CVE-2026-1145?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Buffer overflow in Quickjs-Ng Quickjs

CVE-2026-1145

A flaw has been found in quickjs-ng quickjs up to 0.11.0. Affected by this vulnerability is the function js_typed_array_constructor_ta of the file quickjs.c. This manipulation causes heap-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: 53aebe66170d545bb6265906fe4324e4477de8b4. It is suggested to install a patch to address this issue.

Vulnerability class: Buffer Overflow

Published 2026-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (31.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.1% 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: 0.004 · change: +0.001

Affected products

Quickjs-Ng Quickjs — versions 0.1, 0.2, 0.3

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/ (VDB Entry, Third Party Advisory, third-party-advisory)
github.com/quickjs-ng/quickjs/issues/1305 (issue-tracking, Exploit, Issue Tracking)
github.com/quickjs-ng/quickjs/pull/1306 (issue-tracking, Patch, Issue Tracking)
github.com/quickjs-ng/quickjs/issues/1305 (issue-tracking, Exploit, exploit, Issue Tracking)
github.com/paralin/quickjs/commit/53aebe66170d545bb6265906fe4324e4477de8b4 (Patch, patch)
github.com/quickjs-ng/quickjs/ (product)

Frequently asked questions

What is CVE-2026-1145?: CVE-2026-1145 is a medium-severity vulnerability in Quickjs-Ng Quickjs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.3/10. Published 2026-01-19.
How severe is CVE-2026-1145?: Medium severity. CVSS v3 base score is 6.3 out of 10.