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.
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History
Wed, 14 Jan 2026 20:15:00 +0000
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ssvc
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Wed, 14 Jan 2026 11:15:00 +0000
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Hono
Hono hono |
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Hono
Hono hono |
Tue, 13 Jan 2026 20:00:00 +0000
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| 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. | |
| Title | JWT Algorithm Confusion via Unsafe Default (HS256) in Hono JWT Middleware Allows Token Forgery and Auth Bypass | |
| Weaknesses | CWE-347 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-01-13T19:49:55.316Z
Updated: 2026-01-14T19:12:35.457Z
Reserved: 2026-01-09T22:50:10.289Z
Link: CVE-2026-22817
Updated: 2026-01-14T19:12:32.381Z
Status : Awaiting Analysis
Published: 2026-01-13T20:16:11.570
Modified: 2026-01-14T16:25:40.430
Link: CVE-2026-22817
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