Is CVE-2026-113436 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-113436 being exploited in the wild.

How severe is CVE-2026-113436?

Informational severity, published 26 October 2026.

Which products and versions are affected?

Mtrudel Bandit from 1.0.0-pre.7 before 1.14.0.

Is there a fix for CVE-2026-113436?

Yes: fixed in 1.14.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-113436 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-113436?

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.

CVE-2026-113436: mtrudel bandit inefficient algorithmic complexity in header parser

CVE-2026-113436 · Severity: info · Published 2026-10-26

Bandit is an HTTP server library used to handle web requests. An attacker can send specially crafted HTTP headers with extremely long numbers to consume excessive server CPU resources, causing performance degradation or denial of service. A small amount of traffic can keep a server busy for extended periods.

Technologies: Mtrudel Bandit. Vendors: Mtrudel.

Quick answers

Is CVE-2026-113436 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-113436 being exploited in the wild.
How severe is CVE-2026-113436?: Informational severity, published 26 October 2026.
Which products and versions are affected?: Mtrudel Bandit from 1.0.0-pre.7 before 1.14.0.
Is there a fix for CVE-2026-113436?: Yes: fixed in 1.14.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-113436 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-113436?: 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: 1.14.0

Technical details

The Bandit.Headers.parse_integer/2 function builds large numbers digit-by-digit without limits, resulting in quadratic time complexity and repeated bignum allocations. The vulnerable parser processes raw HTTP/1 and HTTP/2 request data before range validation. Over HTTP/2, attackers can exploit HPACK compression to repeatedly send thousand-digit values using minimal bandwidth to exhaust server resources.

Affected products

mtrudel bandit from 1.0.0-pre.7 before 1.14.0

Timeline

2026-10-26: disclosed

References

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