CVE-2026-44457

Hono: Cache Middleware ignores Vary: Authorization / Vary: Cookie leading to cross-user cache leakage

State: Published
Severity: 5.3 Medium
Published: May 13, 2026
Updated: May 18, 2026
Reserved: May 6, 2026

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, Cache Middleware does not skip caching for responses that declare per-user variance via Vary: Authorization or Vary: Cookie. As a result, a response cached for one authenticated user may be served to subsequent requests from different users. This vulnerability is fixed in 4.12.18.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-524 Use of Cache Containing Sensitive Information

Affected Products

Product	Versions
honohonojs	< 4.12.18Affected

References

https://github.com/honojs/hono/security/advisories/GHSA-p77w-8qqv-26rm

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