CVE-2026-44457: CWE-524: Use of Cache Containing Sensitive Information in honojs hono
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.
AI Analysis
Technical Summary
CVE-2026-44457 is a medium severity vulnerability in the honojs hono framework where the cache middleware fails to respect per-user variance headers (Vary: Authorization or Vary: Cookie). This results in sensitive cached responses intended for one authenticated user being served to different users, potentially exposing sensitive information. The vulnerability is fixed in hono version 4.12.18.
Potential Impact
The vulnerability can lead to unauthorized disclosure of sensitive information by serving cached responses containing user-specific data to other users. There is no indication of integrity or availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade hono to version 4.12.18 or later, where this caching behavior is corrected to skip caching for responses with per-user variance headers. Patch status is not explicitly stated but the fix is included in version 4.12.18, so updating to this version is the recommended remediation.
CVE-2026-44457: CWE-524: Use of Cache Containing Sensitive Information in honojs hono
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 v3.1
Score 5.3medium
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44457 is a medium severity vulnerability in the honojs hono framework where the cache middleware fails to respect per-user variance headers (Vary: Authorization or Vary: Cookie). This results in sensitive cached responses intended for one authenticated user being served to different users, potentially exposing sensitive information. The vulnerability is fixed in hono version 4.12.18.
Potential Impact
The vulnerability can lead to unauthorized disclosure of sensitive information by serving cached responses containing user-specific data to other users. There is no indication of integrity or availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade hono to version 4.12.18 or later, where this caching behavior is corrected to skip caching for responses with per-user variance headers. Patch status is not explicitly stated but the fix is included in version 4.12.18, so updating to this version is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-06T15:49:25.193Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049721cbff5d8610e00ed8
Added to database: 05/13/2026, 15:22:09 UTC
Last enriched: 05/20/2026, 18:26:25 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 76
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.