Detections
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Echo: hono: security update to 4.12.34

medium Tenable Cloud Security Plugin ID 462291

Description

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

 - Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.0 to
 4.12.33, the languageDetector middleware is vulnerable to algorithmic complexity denial of service when
 processing a crafted language tag containing a large number of hyphen separated subtags. To implement
 progressive language tag truncation, normalizeLanguage() repeatedly calls parts.slice(0, i).join('-') for
 every possible prefix, so the total amount of string processing grows quadratically with the number of
 subtags. Language values may come from a query parameter, cookie, Accept-Language header, or URL path,
 depending on the detector configuration, and the default detector order enables query string, cookie, and
 header detection, so applications using languageDetector() may expose this processing to unauthenticated
 requests. An attacker may repeatedly send requests containing long, hyphen separated language tags,
 causing excessive CPU consumption and preventing unrelated requests from being processed. This issue is
 fixed in version 4.12.34. (CVE-2026-71848)

Solution

Update the hono library and its related packages to version 4.12.34 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-71848

Plugin Details

Severity: Medium

ID: 462291

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-71848

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 8/7/2026

Reference Information

CVE: CVE-2026-71848