Detections
Analytics

SCA: security update for rack (GHSA-qfgr-crr9-7r49)

medium Tenable Cloud Security Plugin ID 439714

Description

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

 - Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to
 before 3.2.6, Rack::Utils.forwarded_values parses the RFC 7239 Forwarded header by splitting on semicolons
 before handling quoted-string values. Because quoted values may legally contain semicolons, a header can
 be interpreted by Rack as multiple Forwarded directives rather than as a single quoted for value. In
 deployments where an upstream proxy, WAF, or intermediary validates or preserves quoted Forwarded values
 differently, this discrepancy can allow an attacker to smuggle host, proto, for, or by parameters through
 a single header value. This issue has been patched in versions 3.1.21 and 3.2.6. (CVE-2026-32762)

Solution

Update the rack library and its related packages to version 3.1.21 or later.

See Also

https://github.com/advisories/GHSA-qfgr-crr9-7r49

Plugin Details

Severity: Medium

ID: 439714

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/3/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.71

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-32762

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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: 4/2/2026

Vulnerability Publication Date: 4/2/2026

Reference Information

CVE: CVE-2026-32762

cwe: CWE-436