CVE-2023-28445

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 1.0% (60th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 9.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.0%
EPSS %ILE
60th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

March 24, 2023

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Oct 6, 2026
Patch available. Sources: github_pr, github_release, github.
githubMentions a patch (unverified)

Improper handling of resizable ArrayBuffer in async built-in functions · Advisory · denoland/deno · GitHub

https://github.com/denoland/deno/security/advisories/GHSA-c25x-cm9x-qqgx
github_release Patch Available

v1.32.1

Patch available: denoland/deno v1.32.1

https://github.com/denoland/deno/releases/tag/v1.32.1
github_pr

fix: disable resizable ArrayBuffer and growable SharedArrayBuffer

Fix merged in denoland/deno PR #18395 on 2023-03-23 — awaiting tagged release

https://github.com/denoland/deno/pull/18395

Affected Packages

(3 across 1 ecosystem)
crates.io(3)
PackageVulnerable rangeFix by version rangeDependents
Deno1.32.0
  • 1.32.0 up to 1.32.1: fixed in 1.32.1
—
deno_runtime0.102.0
  • 0.102.0 up to 0.103.0: fixed in 0.103.0
—
serde_v80.87.0
  • 0.87.0 up to 0.88.0: fixed in 0.88.0
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 184 total refreshes for this CVE.

  1. 2026-10-09 20:05 UTCEPSS rescore
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  3. 2026-10-07 23:45 UTCEPSS rescore
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  57. 2026-07-23 02:20 UTCEG score recompute
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  74. 2026-07-15 01:58 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-28445?
CVE-2023-28445 is a critical vulnerability published on March 24, 2023. 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…
When was CVE-2023-28445 disclosed?
CVE-2023-28445 was first published on March 24, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-28445 actively exploited?
CVE-2023-28445 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (60th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-28445?
CVE-2023-28445 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2023-28445?
A fix for CVE-2023-28445 is available: update to the fixed version the vendor names in its advisory.

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