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

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

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 <a ping> 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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- honojs / hono: < 4.13.16 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-352

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/honojs/hono/security/advisories/GHSA-46wx-v44x-9hh2 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/honojs/hono/commit/bf16471913b5199212dac33f5d170f94745dd26a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/honojs/hono/releases/tag/v4.13.16 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-126355; retrieved 2026-11-12; source updated 2026-11-12

Revision: 28670213164de7f19b7ba9db952d561ba05eff1c1a5541cf0af5882b396b4b84

Canonical: https://y2.dev/cve/CVE-2026-126355

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