honojs hono up to 4.12.11 ipRestriction validate before canonicalize

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in honojs hono up to 4.12.11. The affected element is the function ipRestriction. Such manipulation leads to validate before canonicalize. This vulnerability is uniquely identified as CVE-2026-39409. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in honojs hono up to 4.12.11 and classified as problematic. Affected by this issue is the function ipRestriction. The manipulation with an unknown input leads to a validate before canonicalize vulnerability. Using CWE to declare the problem leads to CWE-180. The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step. Impacted is confidentiality. CVE summarizes:

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior. This vulnerability is fixed in 4.12.12.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-39409 since 04/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 4.12.12 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1407). Once again VulDB remains the best source for vulnerability data.

Affected

  • IBM App Connect Enterprise
  • Red Hat Enterprise Linux
  • Fedora Linux
  • IBM QRadar SIEM
  • IBM MQ
  • IBM Maximo Asset Management
  • IBM Sterling Connect:Direct

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Validate before canonicalize
CWE: CWE-180 / CWE-179 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: hono 4.12.12

Timelineinfo

04/07/2026 CVE reserved
04/08/2026 +1 days Advisory disclosed
04/08/2026 +0 days VulDB entry created
06/20/2026 +72 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-39409 (🔒)
GCVE (CVE): GCVE-0-2026-39409
GCVE (VulDB): GCVE-100-356252
CERT Bund: WID-SEC-2026-1407 - IBM App Connect Enterprise Certified Container: Mehrere Schwachstellen

Entryinfo

Created: 04/08/2026 17:21
Updated: 06/20/2026 00:09
Changes: 04/08/2026 17:21 (66), 05/08/2026 00:19 (7), 06/20/2026 00:09 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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