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CVE-2026-22817

🔴 HIGH

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...

Published
Jan 13, 2026
Last Modified
Jan 20, 2026
Views
25
Bookmarks
0

Description

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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.

Affected Products (1)

hono - hono

Version: *

CVSS Scores

CVSS 3.1 8.2
8.2
HIGH
CVSS 2.0 8.2

References

github.com github.com

Additional Information

Source
security-advisories@github.com
State
Analyzed

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