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CVE-2025-55131

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module…

High7.1EPSS 3.5%
Published
Updated
Reserved
Assigned by
hackerone

Description

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact.

Scores

CVSS scores of CVE-2025-55131, by who scored it
Scored byCVSSScoreVector
hackeroneCNA (assigner)3.0High7.1CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
redhat-SADPADP (enrichment)3.1High7.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
NVDNVD · Deferred3.1High7.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
EPSS (exploitation in 30 days)
3.5% · top 11% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Weakness

Affected products

  • nodejs · node

    • affected 20.19.6 – ≤ 20.19.6
    • affected 22.21.1 – ≤ 22.21.1
    • affected 24.12.0 – ≤ 24.12.0
    • affected 25.2.1 – ≤ 25.2.1
    • affected 4.0 – < 4.*
    • affected 5.0 – < 5.*
    • affected 6.0 – < 6.*
    • affected 7.0 – < 7.*
    • affected 8.0 – < 8.*
    • affected 9.0 – < 9.*
    • affected 10.0 – < 10.*
    • affected 11.0 – < 11.*
    • affected 12.0 – < 12.*
    • affected 13.0 – < 13.*
    • affected 14.0 – < 14.*
    • affected 15.0 – < 15.*
    • affected 16.0 – < 16.*
    • affected 17.0 – < 17.*
    • affected 18.0 – < 18.*

References (20)

Sources

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

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Record last updated .