CVE-2025-62610 Hono Improperly Authorizes JWT Audience Validation
Attackers can use tokens issued for other services to gain unauthorized access to APIs using Hono's JWT middleware due to missing audience validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-62610?
CVE-2025-62610 is a high-severity authentication bypass vulnerability in honojs hono, published on 22 Oct 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Hono is a Web application framework that provides support for any JavaScript runtime. In versions from 1.1.0 to before 4.10.2, Hono’s JWT Auth Middleware does not provide a built-in aud (Audience) verification option, which can cause confused-deputy / token-mix-up issues: an API may accept a valid token that was issued for a different audience (e.g., another service) when multiple services share the same issuer/keys. This can lead to unintended cross-service access. Hono’s docs list verification options for iss/nbf/iat/exp only, with no aud support; RFC 7519 requires that when an aud claim is present, tokens MUST be rejected unless the processing party identifies itself in that claim. This issue has been patched in version 4.10.2.
Weakness: CWE-285
Which versions are affected by CVE-2025-62610?
2 open source packages ship an affected version, including hono. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
hono npm | From 1.1.0 | 4.10.2 |
hono npm | From 1.1.0 | 4.10.2 |
Products include Hono Hono.
How do I fix CVE-2025-62610?
Upgrade hono to 4.10.2 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-62610 being exploited?
There is no known exploitation of CVE-2025-62610 in the wild and no public exploit code.
Other vulnerabilities in honojs hono
- CVE-2026-27700 Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo
- CVE-2026-22817 JWT Algorithm Confusion via Unsafe Default (HS256) in Hono JWT Middleware Allows Token Forgery and Auth Bypass
- CVE-2026-22818 JWT algorithm confusion in Hono JWK Auth Middleware when JWK lacks "alg" (untrusted header.alg fallback)
- CVE-2026-29045 Hono: Arbitrary file access via serveStatic vulnerability
- CVE-2025-58362 Hono contains a flaw in URL path parsing, potentially leading to path confusion
Sources
Also known as GHSA-m732-5p4w-x69g, MINI-w9hf-hr28-6xqm.