Allocation of Resources Without Limits or Throttling Affecting bandit package, versions >=3.0.0 <1.11.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-HEX-BANDIT-16346344
- published3 May 2026
- disclosed1 May 2026
- creditPJUllrich
Introduced: 1 May 2026
NewCVE-2026-42788 (opens in a new tab)How to fix?
Upgrade bandit to version 1.11.0 or higher.
Overview
bandit is a HTTP server for Plug and WebSock apps.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the Bandit.HTTP2.Frame.deserialize parser in the HTTP/2 frame decoder. An attacker can send an oversized frame and have it parsed as a normal frame instead of being rejected, allowing malformed HTTP/2 traffic to continue through the connection.
This lets a remote peer feed payloads larger than the negotiated maximum frame size into the server’s HTTP/2 processing path, which can disrupt protocol handling and cause the connection to be dropped or misprocessed.