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SCA: security update for github.com/caddyserver/caddy/v2 (GHSA-f59h-q822-g45g)

high Tenable Self-Hosted Container Security Plugin ID 443346

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, forward_auth
 copy_headers deletes the exact client-supplied identity header before copying the trusted value from the
 auth gateway. But when the request later goes through php_fastcgi, Caddy normalizes HTTP headers into CGI
 variables by replacing - with _. This lets a client send an underscore alias that survives the
 forward_auth delete step but becomes the same PHP/FastCGI variable. Result: a remote client can inject or
 sometimes override identity/group headers trusted by PHP/FastCGI applications behind Caddy. This
 vulnerability is fixed in 2.11.4. (CVE-2026-52845)

Solution

Update the github.com/caddyserver/caddy/v2 library and its related packages to version 2.11.4 or later.

See Also

https://github.com/advisories/GHSA-f59h-q822-g45g

Plugin Details

Severity: High

ID: 443346

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 6/17/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.64

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-52845

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/16/2026

Vulnerability Publication Date: 6/13/2026

Reference Information

CVE: CVE-2026-52845