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CVE-2026-44457

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

Published: May 13, 2026Updated: May 13, 2026 Sources: CVE List NVDCWE-524
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.2%
Top 90.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-524

Affected Products

honohonojs
Library
OSS Libraries / web-framework
honohono
Library
OSS Libraries / web-framework
honojsoss-projectOSS Librariesaka hono
honooss-projectOSS Librariesaka hono js

Exploitability

Official Patch Available

References

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

Timeline

Published
May 13, 2026
Last Updated
May 13, 2026

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