CVE-2026-44457: CWE-524: Use of Cache Containing Sensitive Information in honojs hono
A vulnerability in the honojs hono web framework prior to version 4. 12. 18 allows caching middleware to improperly cache responses that vary per user based on Authorization or Cookie headers. This can lead to one authenticated user's cached response being served to other users. The issue is addressed in version 4. 12. 18. The CVSS score is 5. 3, indicating a medium severity vulnerability.
AI Analysis
Technical Summary
CVE-2026-44457 is a medium severity vulnerability in the honojs hono web application framework's Cache Middleware prior to version 4.12.18. The middleware does not skip caching for responses that declare per-user variance via the Vary header with Authorization or Cookie values. Consequently, cached responses intended for one authenticated user may be served to other users, potentially exposing sensitive information. This is classified under CWE-524 (Use of Cache Containing 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 authenticated users. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade honojs hono to version 4.12.18 or later, where the caching middleware correctly skips caching for responses with Vary headers indicating per-user variance (Authorization or Cookie). Patch status is not explicitly stated but the fix is included in version 4.12.18, so updating to this version or newer is the recommended remediation.
CVE-2026-44457: CWE-524: Use of Cache Containing Sensitive Information in honojs hono
Description
A vulnerability in the honojs hono web framework prior to version 4. 12. 18 allows caching middleware to improperly cache responses that vary per user based on Authorization or Cookie headers. This can lead to one authenticated user's cached response being served to other users. The issue is addressed in version 4. 12. 18. The CVSS score is 5. 3, indicating a medium severity vulnerability.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44457 is a medium severity vulnerability in the honojs hono web application framework's Cache Middleware prior to version 4.12.18. The middleware does not skip caching for responses that declare per-user variance via the Vary header with Authorization or Cookie values. Consequently, cached responses intended for one authenticated user may be served to other users, potentially exposing sensitive information. This is classified under CWE-524 (Use of Cache Containing 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 authenticated users. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade honojs hono to version 4.12.18 or later, where the caching middleware correctly skips caching for responses with Vary headers indicating per-user variance (Authorization or Cookie). Patch status is not explicitly stated but the fix is included in version 4.12.18, so updating to this version or newer 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: 5/13/2026, 3:22:09 PM
Last enriched: 5/13/2026, 3:37:55 PM
Last updated: 5/13/2026, 5:59:33 PM
Views: 3
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