Is CVE-2026-29045 in the CISA KEV catalog?

No. CVE-2026-29045 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-29045?

CVE-2026-29045 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-29045?

CVE-2026-29045 has an EPSS score of 0.44% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-29045?

Upgrade hono to 4.12.4 or later.

CVE & CISA-KEV Catalog

CVE-2026-29045

HIGH

7.5

CVSS v3

NVD

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4.

CWE-177

How to fix

Remediation Available

honoNVD

Affected:< 4.12.4Fixed in:4.12.4CVE-2026-29045derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.44%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-177 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-27780	High	7.5	2.2%	-	Fix
CVE-2018-3718	Medium	5.3	1.3%	-	Fix
CVE-2026-41041	Critical	9.1	0.6%	-	Fix
CVE-2022-3854	Medium	6.5	0.6%	-	Fix
CVE-2026-22031	High	8.4	0.5%	-	Fix
CVE-2024-48866	Medium	5.3	0.4%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-06.