CVE-2026-45135

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Source
https://cve.org/CVERecord?id=CVE-2026-45135
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45135.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-45135
Aliases
Downstream
Published
2026-06-23T17:56:42.662Z
Modified
2026-07-08T08:13:29.389844403Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Caddy: Unsafe Unicode Handling in FastCGI splitPos Allows Execution of Non-PHP Files
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45135.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-176",
        "CWE-178",
        "CWE-20"
    ]
}
References

Affected packages

Git / github.com/caddyserver/caddy

Affected ranges

Type
GIT
Repo
https://github.com/caddyserver/caddy
Events
Introduced
cd486c25d168caf58f4b6fe5d3252df9432901ec
Fixed
cc58caa1099240ef1a4c280b892260b380a85c86
Database specific 
{
    "cpe": "cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "2.7.0"
        },
        {
            "fixed": "2.11.3"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

v2.*
v2.10.0
v2.10.0-beta.1
v2.10.0-beta.2
v2.10.0-beta.3
v2.10.0-beta.4
v2.10.1
v2.10.2
v2.11.0
v2.11.0-beta.1
v2.11.0-beta.2
v2.11.1
v2.11.2
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.7.5
v2.8.0
v2.8.0-beta.1
v2.8.0-beta.2
v2.8.0-rc.1
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.9.0
v2.9.0-beta.1
v2.9.0-beta.2
v2.9.0-beta.3
v2.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45135.json"