Allocation of Resources Without Limits or Throttling Affecting github.com/caddyserver/caddy/v2/modules/caddyhttp/rewrite package, versions <2.11.4
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-GOLANG-GITHUBCOMCADDYSERVERCADDYV2MODULESCADDYHTTPREWRITE-20158557
- published27 Sept 2026
- disclosed18 Sept 2026
- creditUnknown
Introduced: 18 Sep 2026
NewCVE-2026-77281 Â (opens in a new tab)How to fix?
Upgrade github.com/caddyserver/caddy/v2/modules/caddyhttp/rewrite to version 2.11.4 or higher.
Overview
github.com/caddyserver/caddy/v2/modules/caddyhttp/rewrite is a fast, multi-platform web server with automatic HTTPS
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the rewrite process when a placeholder in the URI template resolves to attacker-controlled input and is followed by a literal ?, allowing injected placeholders to be re-expanded and potentially exposing sensitive environment variables or files. An attacker can access confidential data by crafting specific HTTP headers and request paths. Additionally, in the replacer function, referencing the {http.request.body} placeholder causes the entire request body to be read into memory without size limitation, enabling an attacker to exhaust server memory by sending large or unlimited request bodies. Furthermore, in the fileHidden function, improper handling of case sensitivity allows hidden files or directories to be accessed using case-variant paths, enabling attackers to bypass file hiding protections and retrieve sensitive files by altering the case of the request path.