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Back to active CVEs
Medium · CVSS 6.9CVE-2026-109955

Hono 4.12.4 before 4.13.11 Middleware Bypass via serveStatic Double DecodingCVE-2026-109955

Answer in brief

CVE-2026-109955 records a Medium severity (CVSS 6.9) vulnerability in Hono 4.12.4 before 4.13.11 Middleware Bypass via serveStatic Double Decoding. The current sources do not mark it as known exploited. The current feed maps honojs/hono (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 13, 2026Updated Oct 13, 2026Source checked Oct 13, 2026First seen by HOL Oct 13, 2026Material review Oct 13, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps honojs/hono (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
honojs/honogeneric>=4.12.4 <4.13.114.13.11

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for honojs/hono.
  2. 2Review the reported fix. Update honojs/hono to 4.13.11 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 13, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Hono from 4.12.4 before 4.13.11 contains a middleware bypass vulnerability in serveStatic that allows unauthenticated attackers to skip prefix middleware by exploiting double path decoding. Attackers can send malformed percent-encoded paths that the router matches in encoded form, reaching static files without authentication checks running.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • Uncleared Password Keystrokes VulnerabilitySame generic ecosystem
  • ammonia allows stored XSS through unsanitized SVG animate and set attributesSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-174
Source
CVE List V5
Source checked
Oct 13, 2026
References
2 linked sources
Open source record