Is CVE-2026-67182 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-67182 being exploited in the wild.

How severe is CVE-2026-67182?

High severity, with a CVSS score of 7.5, published 28 July 2026.

Which products and versions are affected?

Tomaka Rouille 0.3.3 through 3.6.2.

Is there a fix for CVE-2026-67182?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-67182 attacked?

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

Am I affected by CVE-2026-67182?

Check whether you run Tomaka Rouille 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-2026-67182: tomaka rouille HTTP request smuggling via header injection

CVE-2026-67182 · Severity: high · CVSS 7.5 · Published 2026-07-28

Rouille, a Rust-based web server library, is vulnerable to a security flaw that could allow attackers to bypass intended access controls. By sending specially crafted web requests, an attacker can trick the system into processing hidden, unauthorized commands as if they were legitimate. This could lead to unauthorized actions being performed on the backend server, potentially compromising the integrity of the application's operations.

Technologies: Tomaka Rouille. Vendors: Tomaka.

Quick answers

Is CVE-2026-67182 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-67182 being exploited in the wild.
How severe is CVE-2026-67182?: High severity, with a CVSS score of 7.5, published 28 July 2026.
Which products and versions are affected?: Tomaka Rouille 0.3.3 through 3.6.2.
Is there a fix for CVE-2026-67182?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-67182 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-67182?: Check whether you run Tomaka Rouille 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.

Technical details

Rouille versions 0.3.3 through 3.6.2 are susceptible to HTTP Request Smuggling (CWE-444) due to improper validation of header values. The library copies client-supplied request headers verbatim to upstream connections without sanitizing bare line feed characters (0x0A). An attacker can exploit this by injecting a line feed followed by a complete second HTTP request within a header value. When processed by backend servers that interpret these characters as request delimiters (such as Go's net/http or Python's http.server), the smuggled request is executed with attacker-controlled methods and paths, effectively bypassing any access control logic implemented in the Rouille handler.

Affected products

tomaka rouille 0.3.3 through 3.6.2

Timeline

2026-07-28: advisory: NVD publication date
2026-07-28: disclosed: VulnCheck advisory published

References

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