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Back to active CVEs
Medium · CVSS 5.3CVE-2026-126355

Hono: `csrf()` does not check requests sent by hyperlink auditing (`text/ping`)CVE-2026-126355

Answer in brief

CVE-2026-126355 records a Medium severity (CVSS 5.3) vulnerability in Hono: `csrf()` does not check requests sent by hyperlink auditing (`text/ping`). 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 Nov 12, 2026Updated Nov 12, 2026Source checked Nov 12, 2026First seen by HOL Nov 12, 2026Material review Nov 12, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. 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<4.13.164.13.16

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for honojs/hono.
  2. 2Review the reported fix. Update honojs/hono to 4.13.16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 12, 2026

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

  2. Source modified

    Nov 12, 2026

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

  3. First seen by HOL

    Nov 12, 2026

Sources and claim methodology

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

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.13.16, csrf() limits origin validation to the content types normally sent by HTML forms and therefore does not validate text/ping requests generated by Chromium hyperlink auditing. Chrome and Edge can send a cross-origin credentialed POST without a CORS preflight through an &lt;a ping&gt; action, and the middleware then skips both Origin and Sec-Fetch-Site checks. The fixed request body limits exploitation to state-changing endpoints whose effect is selected by the path or query string and does not depend on submitted body data. The user's cookie must accompany the request, which generally requires a same-site origin or a cookie configured with SameSite=None, and Firefox does not send hyperlink-auditing pings by default. This issue is fixed in version 4.13.16.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Hono: `validator('form')` skips validation for `multipart/form-data` requests with extra parametersSame honojs/hono package
  • Hono: `mount()` and `app.mount()` can forward a path that bypasses middleware scoped inside the mount prefixSame honojs/hono package
  • Hono: RegExpRouter skips wildcard middleware for some route sets and for paths with an encoded line terminatorSame honojs/hono package
  • Hono: `css` helper does not escape a closing tag split between the template and an interpolated value, allowing HTML injectionSame honojs/hono package

Record context

Vulnerability class
CSRF
EPSS
Not reported
CWE IDs
CWE-352
Source
CVE List V5
Source checked
Nov 12, 2026
References
3 linked sources
Open source record