# CVE-2026-105659: mtrudel bandit uncontrolled resource consumption in HTTP/2

Source: https://junglewise.ai/threats/cve-2026-105659-uncontrolled-resource-consumption-vulnerability-in-mtrudel  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-105659 · Severity: info · Published 2026-10-14

Bandit is an HTTP/2 server library for Elixir. An unauthenticated remote attacker can send specially crafted HTTP/2 frames (small WINDOW_UPDATE messages and SETTINGS frames) to indefinitely block stream processes and exhaust server resources, causing denial of service and potential application unavailability.

Technologies: [Mtrudel Bandit](https://junglewise.ai/threats/technologies/mtrudel-bandit). Vendors: [Mtrudel](https://junglewise.ai/threats/vendors/mtrudel).

## Quick answers

**Is CVE-2026-105659 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105659 being exploited in the wild.

**How severe is CVE-2026-105659?** Informational severity, published 14 October 2026.

**Which products and versions are affected?** Mtrudel Bandit 1.4.0 before 1.13.0.

**Is there a fix for CVE-2026-105659?** Yes: fixed in 1.13.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105659 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-105659?** Check whether you run Mtrudel Bandit at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.13.0

## Technical details

The vulnerability exists in Bandit's HTTP/2 stream and connection window management. By sending periodic small WINDOW_UPDATE frames on stream 0 and manipulating SETTINGS_INITIAL_WINDOW_SIZE, an attacker can keep blocked streams alive with fresh deadlines, causing the server to accumulate stuck processes and hold their associated resources indefinitely. The attack has two independent paths: one at the connection level and one at the stream level, with the stream-level path remaining exploitable even if the connection-level issue is patched.

## Affected products

- mtrudel bandit 1.4.0 before 1.13.0

## Timeline

- 2026-10-14: disclosed

## References

- [https://repo.hex.pm/](https://repo.hex.pm/)
- [https://github.com/](https://github.com/)

## Related threats

- [mtrudel bandit resource exhaustion in HTTP/2 request body reader](https://junglewise.ai/threats/cve-2026-116078-allocation-of-resources-without-limits-or-throttling)
- [mtrudel bandit HTTP/2 stream resource exhaustion](https://junglewise.ai/threats/cve-2026-115269-allocation-of-resources-without-limits-or-throttling)
- [mtrudel bandit WebSocket denial of service via fragmented messages](https://junglewise.ai/threats/cve-2026-114213-allocation-of-resources-without-limits-or-throttling)
- [mtrudel bandit inefficient algorithmic complexity in header parser](https://junglewise.ai/threats/cve-2026-113436-inefficient-algorithmic-complexity-vulnerability-in-the-header)
- [mtrudel bandit HTTP/2 handler resource limit bypass](https://junglewise.ai/threats/cve-2026-111103-improper-cleanup-on-thrown-exception-vulnerability-in-the-http-2)