HTTP Request Smuggling Affecting github.com/caddyserver/caddy/v2/modules/caddyhttp package, versions >=0.0.0
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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- published30 Jun 2026
- disclosed23 Jun 2026
- creditVincent550102
Introduced: 23 Jun 2026
CVE-2026-52845 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the copy_headers process. An attacker can inject or override identity and group headers by sending specially crafted HTTP headers with underscores that bypass the header deletion step during normalization, potentially allowing unauthorized access or privilege escalation in applications behind the server.