CVE-2026-85181Network attack vectorHinoki check available

Admin session forgery via unkeyed cookie checksum

Published Sep 3, 2026 · Updated Sep 3, 2026

Authentication bypass in Dianping CAT 3.1.0 and earlier allows remote attackers to forge administrator sessions through cookies. The session-cookie validator accepts Java String.hashCode output as its sole integrity value instead of verifying a server-keyed authenticator. A forged cookie and attacker-controlled x-forwarded-for value defeat the IP binding, granting full configuration access without credentials.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Dianping CAT 3.1.0 and earlier allows remote attackers to forge administrator sessions through cookies. The session-cookie validator accepts Java String.hashCode output as its sole integrity value instead of verifying a server-keyed authenticator. A forged cookie and attacker-controlled x-forwarded-for value defeat the IP binding, granting full configuration access without credentials.

The record

CVE
CVE-2026-85181
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
Dianping
Product
CAT
Classifications
CWE-354, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dianping · CATversion=0 <=3.1.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-354Improper Validation of Integrity Check Value
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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