HTTP Response Splitting Affecting rouille package, versions >=0.4.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-ROUILLE-18506915
- published2 Aug 2026
- disclosed28 Jul 2026
- creditUnknown
Introduced: 28 Jul 2026
NewCVE-2026-66746 (opens in a new tab)How to fix?
There is no fixed version for rouille.
Overview
Affected versions of this package are vulnerable to HTTP Response Splitting via the processing of attacker-supplied input in HTTP headers. An attacker can inject arbitrary response headers by embedding carriage return or line feed characters into query parameters or cookie values, leading to cache poisoning, session fixation, and the override of security headers such as CSP or CORS by sending specially crafted requests.