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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-1528

undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client

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Status
Published
Published
Updated
Assigning organization
openjs

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

undici undici

Default version status: unaffected

  • >= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0affected
  • 6.24.0: 7.24.0unaffected

References