Detections
Analytics

Echo: ruby3.3: security update to 3.3.13-0+deb13u1

medium Tenable Self-Hosted Container Security Plugin ID 478647

Description

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

 - Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions
 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a
 connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service
 attack on the client process by sending a big iteration count value. This issue has been patched in
 versions 0.4.24, 0.5.14, and 0.6.4. (CVE-2026-42256)

Solution

Update the ruby3.3 library and its related packages to version 3.3.13-0+deb13u1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-42256

Plugin Details

Severity: Medium

ID: 478647

Version: Revision 1.1

Type: Local

Published: 11/8/2026

Updated: 11/8/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

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-2026-42256

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6

Threat Score: 2.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/6/2026

Vulnerability Publication Date: 5/4/2026

Reference Information

CVE: CVE-2026-42256