CVE-2026-44457CWE-524

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

Medium · published May 13, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
24.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00330 · 24.9th percentile
Weakness
CWE-524 · Use of Cache Containing Sensitive Information
Published
2026-05-13T14:58Z
EPSS history
Timeline
  • 13 MAY 14:58Z
    Hono: Cache Middleware ignores Vary: Authorization / Vary: Cookie leading to cross-user cache leakage
    cvelistv5