CVE-2026-2229 Affecting renovate package, versions <43.84.0-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.19% (41st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-RENOVATE-15753995
  • published23 Mar 2026
  • disclosed12 Mar 2026

Introduced: 12 Mar 2026

NewCVE-2026-2229  (opens in a new tab)

How to fix?

Upgrade Chainguard renovate to version 43.84.0-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream renovate package and not the renovate package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the server_max_window_bits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. A malicious server can respond with an out-of-range server_max_window_bits value (outside zlib's valid range of 8-15). When the server subsequently sends a compressed frame, the client attempts to create a zlib InflateRaw instance with the invalid windowBits value, causing a synchronous RangeError exception that is not caught, resulting in immediate process termination.

The vulnerability exists because:

  • The isValidClientWindowBits() function only validates that the value contains ASCII digits, not that it falls within the valid range 8-15
  • The createInflateRaw() call is not wrapped in a try-catch block
  • The resulting exception propagates up through the call stack and crashes the Node.js process

CVSS Base Scores

version 3.1