# CVE-2026-108525: mtrudel bandit HTTP/2 denial of service

Source: https://junglewise.ai/threats/cve-2026-108525-allocation-of-resources-without-limits-or-throttling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-108525 · Severity: info · Published 2026-10-26

Bandit is an HTTP/2 web server library. An unauthenticated attacker can exhaust server memory by sending crafted HTTP/2 frames that bypass flow-control checks, causing the server to queue unlimited data and eventually crash. This results in denial of service to legitimate users.

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

## Quick answers

**Is CVE-2026-108525 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108525 being exploited in the wild.

**How severe is CVE-2026-108525?** Informational severity, published 26 October 2026.

**Which products and versions are affected?** Mtrudel Bandit 0.3.1 before 1.14.0.

**Is there a fix for CVE-2026-108525?** Yes: fixed in bandit 1.14.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-108525 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-108525?** 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 bandit 1.14.0

## Technical details

The vulnerability exists in HTTP/2 flow-control implementation: handle_frame/3 forwards DATA frames to stream processes without validating the receive window, and compute_recv_window/2 replenishes the window upon arrival rather than consumption and never sends FLOW_CONTROL_ERROR on violations. An attacker requests a response larger than the 65,535-byte initial window, withholds WINDOW_UPDATE frames, then floods small DATA frames on the blocked stream; each frame queues in the stream mailbox until memory exhaustion.

## Affected products

- mtrudel bandit 0.3.1 before 1.14.0

## Timeline

- 2026-10-26: 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)