CVE-2026-85181
CAT through 3.1.0 Session Cookie Forgery via Unkeyed hashCode Checksum
- State
- Published
- Severity
- 9.3 Critical
- Published
- Sep 3, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 3, 2026
Description
CAT uses Java String.hashCode as the sole integrity check for session cookies without server-side keying, allowing attackers to forge valid checksums offline. Attackers can set the x-forwarded-for header to bypass IP binding validation and create admin sessions with full configuration access.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-565 Reliance on Cookies without Validation and Integrity Checking
Affected Products
| Product | Versions |
|---|---|
catdianping |
|
References
- GitHub Issue #2384issue-tracking
- https://github.com/dianping/catproduct
- TokenBuilder.java at 3.1.0technical-description
- HttpUtils.java at 3.1.0technical-description
- VulnCheck Advisory: CAT through 3.1.0 Session Cookie Forgery via Unkeyed hashCode Checksumthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.