Detections
Analytics

SCA: security update for rack (GHSA-qv7j-4883-hwh7)

high Tenable Self-Hosted Container Security Plugin ID 439712

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::Sendfile#map_accel_path interpolates the value of the X-Accel-Mapping request header directly into a
 regular expression when rewriting file paths for X-Accel-Redirect. Because the header value is not
 escaped, an attacker who can supply X-Accel-Mapping to the backend can inject regex metacharacters and
 control the generated X-Accel-Redirect response header. In deployments using Rack::Sendfile with x-accel-
 redirect, this can allow an attacker to cause nginx to serve unintended files from configured internal
 locations. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6. (CVE-2026-34830)

Solution

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

See Also

https://github.com/advisories/GHSA-qv7j-4883-hwh7

Plugin Details

Severity: High

ID: 439712

Version: Revision 1.9

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:C/I:N/A:N

CVSS Score Source: CVE-2026-34830

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:H/I:N/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-2026-34830

cwe: CWE-625