DEBIAN-CVE-2026-45135
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.
DEBIAN-CVE-2026-45135
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-45135
caddy
Source reference: /affected/0/package/name
- Affected versions
- 2.11.2-1
Source reference:
/affected/0/versions2.11.2-1~bpo13+1Source reference:
/affected/0/versions2.6.2-12Source reference:
/affected/0/versions2.6.2-13Source reference:
/affected/0/versions2.6.2-14Source reference:
/affected/0/versions - Fixed versions
- 2.11.4-1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.11.4-1"
}
]
}
],
"package": {
"name": "caddy",
"purl": "pkg:deb/debian/caddy?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.11.2-1",
"2.11.2-1~bpo13+1",
"2.6.2-12",
"2.6.2-13",
"2.6.2-14"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-45135.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56510 · Revision 1
- Added to Heist Feed
- Publisher date