# CVE-2026-114216: Bandit HTTP request smuggling in chunked body reader

Source: https://junglewise.ai/threats/cve-2026-114216-inconsistent-interpretation-of-http-requests-http-request  
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-2026-114216 · Severity: info · Published 2026-10-26

Bandit is an Elixir-based web server library. An HTTP request smuggling vulnerability in its chunked body reader allows an unauthenticated remote attacker to bypass a front-end proxy and inject a second request into the application, potentially reaching protected endpoints or causing account takeover. Only deployments with a proxy in front of Bandit are vulnerable; direct exposure is not affected.

## Quick answers

**Is CVE-2026-114216 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-114216 being exploited in the wild.

**How severe is CVE-2026-114216?** Informational severity, published 26 October 2026.

**Which products and versions are affected?** Bandit 1.12.4 to before 1.14.0.

**Is there a fix for CVE-2026-114216?** 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-2026-114216 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-114216?** Check whether you run 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 is an inconsistent interpretation of HTTP requests (request/response smuggling) in the HTTP/1.1 chunked body reader of lib/bandit/http1/socket.ex. The reader fails to validate chunk extensions against RFC 9112 grammar, allowing bare LF, CR, and other control bytes to be interpreted differently by front-end proxies, causing request desynchronization. An attacker sends a malformed chunk with a bare LF that proxies interpret as a single request boundary but Bandit interprets as two separate pipelined requests.

## Affected products

- Bandit 1.12.4 to before 1.14.0

## Timeline

- 2026-10-26: disclosed

## References

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