ZDF
Sign inSign up

Vulnerabilities

Security incident · CVE-2025-55131

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the module with the timeout option.

Published Jan 20, 2026 · catalog updated Jul 15, 2026 · Node

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-55131. EPSS is 3.45%. Act only if a listed version of Node is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.45%
Remediation
Advisory link
Affected products
vendor nodejs Node 25.2.1 ≤25.2.1

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the module with the timeout option. Under specific timing conditions, buffers allocated with and other instances like 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 integr

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor nodejs Node 25.2.1 ≤25.2.125.2.1 ≤25.2.1

How to fix CVE-2025-55131

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-55131. EPSS is 3.45%. Act only if a listed version of Node is installed.

Which versions are affected?

Compare what you have installed with nodejs Node 25.2.1 ≤25.2.1 25.2.1 ≤25.2.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 3.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 20, 2026 · EUVD

    Detected

    A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the module with the timeout option. Under specific timing conditions, buffers allocated with and other instances like may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation t

  2. Jul 15, 2026 · EUVD

    Updated

    A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the module with the timeout option. Under specific timing conditions, buffers allocated with and other instances like may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation t

Sources

  • CVE.orgVulnerability recordCVE-2025-55131

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-55131

    30-day exploitation probability 3.45%

    first.org
  • EUVDVulnerability recordEUVD-2026-3331

    A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the module with the timeout option. Under specific timing conditions, buffers allocated with and other instances like may contain leftover data from previous o

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgNov 4, 2026
  • EUVDNov 2, 2026