How severe is CVE-2026-47674?

CVE-2026-47674 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-47674 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-47674?

CVE-2026-47674 affects Hono. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-47674?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-47674 have an EU (EUVD) identifier?

Yes. CVE-2026-47674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32926.

When was CVE-2026-47674 published?

CVE-2026-47674 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-47674

CVE-2026-47674 is a medium-severity vulnerability in Hono with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-185.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32926
Weakness: CWE-185
Affected product: Hono
Published: 2026-05-28
Last modified: 2026-06-17

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the ip-restriction middleware (hono/ip-restriction) compares incoming IP addresses against configured deny and allow rules using string equality after partial normalization. Non-canonical IPv6 representations of an address already listed in a static rule — such as compressed forms, explicit-zero forms, or hex-notation IPv4-mapped addresses — do not match the normalized rule entry, causing the rule to be silently skipped. This vulnerability is fixed in 4.12.21.

Frequently asked questions

What is CVE-2026-47674?: Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, the ip-restriction middleware (hono/ip-restriction) compares incoming IP addresses against configured deny and allow rules using string equality after partial normalization. Non-canonical IPv6 representations of an address already listed in a static rule — such as compressed forms, explicit-zero forms, or hex-notation IPv4-mapped addresses — do not match the normalized rule entry, causing the rule to be silently skipped. This vulnerability is fixed in 4.12.21.
How severe is CVE-2026-47674?: CVE-2026-47674 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-47674 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-47674?: CVE-2026-47674 affects Hono. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-47674?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-47674 have an EU (EUVD) identifier?: Yes. CVE-2026-47674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32926.
When was CVE-2026-47674 published?: CVE-2026-47674 was published on 2026-05-28 and last updated on 2026-06-17.

References

https://github.com/honojs/hono/security/advisories/GHSA-xrhx-7g5j-rcj5

Affected products (1)

cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*

More vulnerabilities in Hono

CVE-2026-27700 — High (CVSS 8.2): Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1,…
CVE-2026-22818 — High (CVSS 8.2): Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.11.4, there is a flaw…
CVE-2026-22817 — High (CVSS 8.2): Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.11.4, there is a flaw…
CVE-2025-62610 — High (CVSS 8.1): Hono is a Web application framework that provides support for any JavaScript runtime. In versions from 1.1.0 to before…
CVE-2026-39408 — High (CVSS 7.5): Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path…
CVE-2026-29045 — High (CVSS 7.5): Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when…

All CVEs affecting Hono →

Other CWE-185 vulnerabilities

CVE-2024-52289 — Critical (CVSS 9.8): authentik is an open-source identity provider. Redirect URIs in the OAuth2 provider in authentik are checked by RegEx…
CVE-2019-12798 — Critical (CVSS 9.8): An issue was discovered in Artifex MuJS 1.0.5. regcompx in regexp.c does not restrict regular expression program size,…
CVE-2026-25896 — Critical (CVSS 9.3): fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based…
CVE-2026-4296 — High (CVSS 8.8): An incorrect regular expression vulnerability was identified in GitHub Enterprise Server that allowed an attacker to…
CVE-2018-17984 — High (CVSS 7.8): An unanchored /[a-z]{2}/ regular expression in ISPConfig before 3.1.13 makes it possible to include arbitrary files,…
CVE-2026-33418 — High (CVSS 7.5): DiceBear is an avatar library for designers and developers. Prior to version 9.4.2, the `ensureSize()` function in…

Browse all CWE-185 vulnerabilities →