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Vulnerabilities

CVE-2026-45135 | BDVDB-2026-342265 Detail

caddyservercaddy

Description#

Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transport's splitPos() in modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. Two distinct flaws in that fallback let an attacker mislead Caddy's FastCGI splitting into treating a non-.php (or other configured split_path extension) file as a script. In any deployment where the attacker can place content into a file served via FastCGI (uploads, file storage, etc.), this can be escalated to remote code execution by crafting a URL whose path triggers either flaw. This vulnerability is fixed in 2.11.3.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

  • CWE-20 Improper Input Validation
  • CWE-176 Improper Handling of Unicode Encoding
  • CWE-178 Improper Handling of Case Sensitivity

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.