VYPR
High severityNVD Advisory· Published Mar 12, 2026· Updated Mar 13, 2026

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

CVE-2026-1528

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
undicinpm
>= 6.0.0, < 6.24.06.24.0
undicinpm
>= 7.0.0, < 7.24.07.24.0

Affected products

51

Patches

Vulnerability mechanics

References

5

News mentions

0

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