CVE-2026-85181

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/dianping/cat
https://github.com/dianping/cat/blob/3.1.0/cat-home/src/main/java/com/dianping/cat/system/page/login/service/TokenBuilder.java
https://github.com/dianping/cat/blob/3.1.0/cat-home/src/main/java/com/dianping/cat/util/HttpUtils.java
https://github.com/dianping/cat/issues/2384
https://www.vulncheck.com/advisories/cat-through-3.1.0-session-cookie-forgery-via-unkeyed-hashcode-checksum

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-03 15:17

Updated : 2026-09-03 18:17

NVD link : CVE-2026-85181

Mitre link : CVE-2026-85181

CVE.ORG link : CVE-2026-85181

JSON object : View

Products Affected

No product.

CWE

CWE-565

Reliance on Cookies without Validation and Integrity Checking

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