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Vulnerability record · CVE-2023-28445 · published 24 March 2023

CVE-2023-28445: Deno out-of-bounds read vulnerability

Deno · Deno

Deno is a runtime for JavaScript and TypeScript that uses V8 and is built in Rust. Resizable ArrayBuffers passed to asynchronous functions that are shrunk during the asynchronous operation could result in an out-of-bound read/write. It is unlikely that this has been exploited in the wild, as the only version affected is Deno 1.32.0. Deno Deploy users are not affected. The problem has been resolved by disabling resizable ArrayBuffers temporarily in Deno 1.32.1. Deno 1.32.2 will re-enable resizable ArrayBuffers with a proper fix. As a workaround, run with `--v8-flags=--no-harmony-rab-gsab` to disable resizable ArrayBuffers.

9.8 CVSS 3.1 Critical EPSS 0.97% · top 39.6% CWE-125 · Out-of-bounds readCWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score
0.97%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Deno is a runtime for JavaScript and TypeScript that uses V8 and is built in Rust. Resizable ArrayBuffers passed to asynchronous functions that are shrunk during the asynchronous operation could result in an out-of-bound read/write. It is unlikely that this has been exploited in the wild, as the only version affected is Deno 1.32.0. Deno Deploy users are not affected. The problem has been resolved by disabling resizable ArrayBuffers temporarily in Deno 1.32.1. Deno 1.32.2 will re-enable resizable ArrayBuffers with a proper fix. As a workaround, run with `--v8-flags=--no-harmony-rab-gsab` to disable resizable ArrayBuffers.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/denoland/deno/pull/18395 PatchVendor Advisory
https://github.com/denoland/deno/releases/tag/v1.32.1 PatchRelease Notes
https://github.com/denoland/deno/security/advisories/GHSA-c25x-cm9x-qqgx MitigationVendor Advisory
https://github.com/denoland/deno/pull/18395 PatchVendor Advisory
https://github.com/denoland/deno/releases/tag/v1.32.1 PatchRelease Notes
https://github.com/denoland/deno/security/advisories/GHSA-c25x-cm9x-qqgx MitigationVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-28445), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.