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HIGH

CVE-2020-8265

CVSS v3

8.1

HIGH

EPSS Score

9.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • nodeBitnamifrom 10.0.0 · fixed in 10.23.1and 1 other package
  • nodejs-nodemonAlmaLinux:8all versions · fixed in 2.0.3-1.module_el8.4.0+2521+c668cc9f
  • nodejs-packagingAlmaLinux:8all versions · fixed in 23-3.module_el8.4.0+2522+3bd42762

Vendor advisories

  • CVE-2020-8265 Red Hat Product Security242 products fixed

    nodejs: use-after-free in the TLS implementation

  • ICSA-22-111-03 CISA1 known affected

    Hitachi Energy MicroSCADA Pro/X SYS600

    SYS600: Versions 10.1.1 and prior

  • ICSA-22-090-02 CISA1 known affected

    Hitachi Energy e-mesh EMS

    e-mesh EMS: Version 1.0

  • ICSA-22-069-09 CISA1 known affected

    Siemens SINEC INS

    SINEC INS

  • SSA-389290 Siemens ProductCERT1 known affected

    SSA-389290: Third-Party Component Vulnerabilities in SINEC INS

    SINEC INS

  • RHSA-2021:0551 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: nodejs:14 security and bug fix update

5 more advisories

Full record on NVD

Description

Node.js versions before 10.23.1, 12.20.1, 14.15.4, 15.5.1 are vulnerable to a use-after-free bug in its TLS implementation. When writing to a TLS enabled socket, node::StreamBase::Write calls node::TLSWrap::DoWrite with a freshly allocated WriteWrap object as first argument. If the DoWrite method does not return an error, this object is passed back to the caller as part of a StreamWriteResult structure. This may be exploited to corrupt memory leading to a Denial of Service or potentially other exploits.

Technical details

Published
2021-01-06

Frequently asked questions

What is CVE-2020-8265?

Node.js versions before 10.23.1, 12.20.1, 14.15.4, 15.5.1 are vulnerable to a use-after-free bug in its TLS implementation. When writing to a TLS enabled socket, node::StreamBase::Write calls node::TLSWrap::DoWrite with a freshly allocated WriteWrap object as first argument. If the DoWrite method does not return an error, this object is passed back to the caller as part of a StreamWriteResult structure. This may be exploited to corrupt memory leading to a Denial of Service or potentially other exploits.

Is CVE-2020-8265 actively exploited?

Active exploitation of CVE-2020-8265 has not been confirmed. Its EPSS score was 9.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8265?

CVE-2020-8265 has a CVSS v3 base score of 8.1 (HIGH severity).

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