Hono Improperly Authorizes JWT Audience Validation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-285.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| honojs | hono | 1.1.0 to before 4.10.2 | 4.10.2 | Patch available | CNA |
| — | hono (npm) | 1.1.0 to before 4.10.2 | 4.10.2 | Patch available | GHSA-m732-5p4w-x69g |
- hono Vendorhonojs Affected 1.1.0 to before 4.10.2 Fixed in 4.10.2 Patch available CNA
- hono (npm) Vendor— Affected 1.1.0 to before 4.10.2 Fixed in 4.10.2 Patch available GHSA-m732-5p4w-x69g
Remediation
- Fix · CNA hono (honojs) Fixed in 4.10.2
- Fix · GHSA-m732-5p4w-x69g hono (npm) Fixed in 4.10.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-62610
- 2026-10-03 Alias added: GHSA-m732-5p4w-x69g
References
More honojs Hono vulnerabilities
- TI-2024-21741 Hono vulnerable to Restricted Directory Traversal in serveStatic with deno CVSS 3.1MEDIUM 5.3
- TI-2024-32610 Hono vulnerable to bypass of CSRF Middleware by a request without Content-Type header. CVSS 3.1MEDIUM 5.9
- TI-2024-29381 Hono CSRF middleware can be bypassed using crafted Content-Type header CVSS 3.1MEDIUM 5.0
- TI-2026-23190 Hono: Arbitrary file access via serveStatic vulnerability CVSS 3.1CRITICAL 9.8
- TI-2026-22076 Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo CVSS 3.1HIGH 8.2
- TI-2026-18334 JWT algorithm confusion in Hono JWK Auth Middleware when JWK lacks "alg" (untrusted header.alg fallback) CVSS 3.1HIGH 8.2
Sources
- CVE-2025-62610 · CVE Program
- CVE-2025-62610 · NVD
- FIRST EPSS
- GHSA-m732-5p4w-x69g · GitHub Advisory Database · CC BY 4.0
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