CVE-2026-30851

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Source
https://cve.org/CVERecord?id=CVE-2026-30851
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30851.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-30851
Aliases
Downstream
Related
Published
2026-03-07T16:28:37Z
Modified
2026-08-12T03:51:24Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation
Details

Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forward_auth copy_headers does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-287",
        "CWE-345"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30851.json"
}
References

Affected packages

Git / github.com/caddyserver/caddy

Affected ranges

Type
GIT
Repo
https://github.com/caddyserver/caddy
Events
Introduced
fb22a26b1a08a2fa3b2526d1852467904ee140f6
Fixed
ffb6ab0644f24c5ee6542aca6bd59b7a1b0a8f91
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "2.10.0"
        },
        {
            "fixed": "2.11.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

v2.*
v2.10.0
v2.10.1
v2.10.2
v2.11.0
v2.11.0-beta.1
v2.11.0-beta.2
v2.11.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30851.json"