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NVD description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.11.4, there is a flaw in Hono’s JWK/JWKS JWT verification middleware allowed the JWT header’s alg value to influence signature verification when the selected JWK did not explicitly specify an algorithm. This could enable JWT algorithm confusion and, in certain configurations, allow forged tokens to be accepted. As part of this fix, the JWT middleware now requires the alg option to be explicitly specified. This prevents algorithm confusion by ensuring that the verification algorithm is not derived from untrusted JWT header values. This vulnerability is fixed in 4.11.4.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
Critical CVEs affect JWT libraries into 2026, including CVE-2026-22817. Researchers logged 6 critical JWT CVEs in 2025 alone, with one bug bounty paying $10k for a single forged admin token.
Post summary
A new critical CVE, CVE-2026-22817, is announced for JWT libraries, with mention of a 2025 bug bounty for forging an admin token.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | hono | hono | - | node.js | - |