Detections
Analytics

SCA: security update for github.com/caddyserver/caddy/v2 (GHSA-x76f-jf84-rqj8)

high Tenable Self-Hosted Container Security Plugin ID 437989

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 HTTP
 `host` request matcher is documented as case-insensitive, but when configured with a large host list (>100
 entries) it becomes case-sensitive due to an optimized matching path. An attacker can bypass host-based
 routing and any access controls attached to that route by changing the casing of the `Host` header.
 Version 2.11.1 contains a fix for the issue. (CVE-2026-27588)

See Also

https://github.com/advisories/GHSA-x76f-jf84-rqj8

Plugin Details

Severity: High

ID: 437989

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 2/26/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.59

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-27588

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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-2026-27588

cwe: CWE-178