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Security Advisories

CVE-2026-1528

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-1528

Severity

7.5

High

CVSS V3

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Description

ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.

Patches

Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.

References

  • https://nvd.nist.gov/vuln/detail/CVE-2026-1528
  • https://github.com/advisories/GHSA-f269-vfmq-vjvj
  • https://cna.openjsf.org/security-advisories.html
  • https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj
  • https://hackerone.com/reports/3537648

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