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SCA: security update for github.com/caddyserver/caddy/v2 (GHSA-5r3v-vc8m-m96g)

critical Tenable Self-Hosted Container Security Plugin ID 437991

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 version 2.11.1, Caddy's FastCGI
 path splitting logic computes the split index on a lowercased copy of the request path and then uses that
 byte index to slice the original path. This is unsafe for Unicode because `strings.ToLower()` can change
 UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect
 `SCRIPT_NAME`/`SCRIPT_FILENAME` and `PATH_INFO`, potentially causing a request that contains `.php` to
 execute a different on-disk file than intended (path confusion). In setups where an attacker can control
 file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files
 (potential RCE depending on deployment). Version 2.11.1 fixes the issue. (CVE-2026-27590)

See Also

https://github.com/advisories/GHSA-5r3v-vc8m-m96g

Plugin Details

Severity: Critical

ID: 437991

Version: Revision 1.17

Type: Local

Family: SCA Checks

Published: 2/27/2026

Updated: 6/26/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.48

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-27590

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/24/2026

Vulnerability Publication Date: 2/24/2026

Reference Information

CVE: CVE-2026-27590

cwe: CWE-20