Detections
Analytics

SCA: security update for webrick (GHSA-r995-q44h-hr64)

medium Tenable Self-Hosted Container Security Plugin ID 437229

Description

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

 - Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers
 to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable
 when the product is deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw
 exists within the read_headers method. The issue results from the inconsistent parsing of terminators of
 HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-
 CAN-21876. (CVE-2025-6442)

See Also

https://github.com/advisories/GHSA-r995-q44h-hr64

Plugin Details

Severity: Medium

ID: 437229

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 1/28/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2025-6442

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/26/2025

Vulnerability Publication Date: 6/25/2025

Reference Information

CVE: CVE-2025-6442

IAVA: 2025-A-0449

cwe: CWE-444