Bug 2447145 (CVE-2026-1528) - CVE-2026-1528 undici: undici: Denial of Service via crafted WebSocket frame with large length
Summary: CVE-2026-1528 undici: undici: Denial of Service via crafted WebSocket frame w...
Keywords:
Status: NEW
Alias: CVE-2026-1528
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2447157 2447158 2447160 2447162
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-12 21:02 UTC by OSIDB Bzimport
Modified: 2026-03-12 22:22 UTC (History)
54 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-03-12 21:02:00 UTC 
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.
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