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CVE-2026-58045

A flaw in Node.js allows a spoofed `TypedArray` `byteLength` to trigger a reachable assertion in the synchronous `node:zlib` APIs, causing…

Medium6.2EPSS 0.17%
Published
Updated
Reserved
Assigned by
hackerone

Description

A flaw in Node.js allows a spoofed `TypedArray` `byteLength` to trigger a reachable assertion in the synchronous `node:zlib` APIs, causing the entire process to crash. All 11 synchronous zlib functions are affected. Repeated exploitation of this condition can result in a denial of service. This vulnerability affects Node.js **22.x**, **24.x**, and **26.x**.

Scores

CVSS scores of CVE-2026-58045, by who scored it
Scored byCVSSScoreVector
hackeroneCNA (assigner)3.0Medium6.2CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Awaiting Analysis3.0Medium6.2CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.17% · top 94% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.

Weakness

Affected products

  • nodejs · node

    • affected 26.5.0 – ≤ 26.5.0
    • affected 24.18.0 – ≤ 24.18.0
    • affected 22.23.1 – ≤ 22.23.1

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .