Detections
Analytics

SCA: security update for rack (GHSA-v569-hp3g-36wr)

high Tenable Self-Hosted Container Security Plugin ID 439700

Description

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

 - Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6,
 Rack::Utils.select_best_encoding processes Accept-Encoding values with quadratic time complexity when the
 header contains many wildcard (*) entries. Because this method is used by Rack::Deflater to choose a
 response encoding, an unauthenticated attacker can send a single request with a crafted Accept-Encoding
 header and cause disproportionate CPU consumption on the compression middleware path. This results in a
 denial of service condition for applications using Rack::Deflater. This issue has been patched in versions
 2.2.23, 3.1.21, and 3.2.6. (CVE-2026-34230)

Solution

Update the rack library and its related packages to version 2.2.23 or later.

See Also

https://github.com/advisories/GHSA-v569-hp3g-36wr

Plugin Details

Severity: High

ID: 439700

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: 3

Percentile: 23.73

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-34230

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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-2026-34230