CVE-2026-16953Public exploitNetwork attack vector

Cross-session file deletion via client-supplied ownership key

Published Aug 8, 2026 · Updated Aug 8, 2026

Authorization bypass in Meow Apps AI Engine before 3.6.4 allows remote attackers to delete another guest's uploaded chatbot files. The file-deletion REST endpoint treats the client-supplied mwai_session_id cookie as the ownership key without independently verifying that the referenced file belongs to that session. Exploitation requires a freely issued guest nonce plus the victim's session identifier and file reference; success removes the record and unlinks the backing file.

CVSS severity4.8
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Meow Apps AI Engine before 3.6.4 allows remote attackers to delete another guest's uploaded chatbot files. The file-deletion REST endpoint treats the client-supplied mwai_session_id cookie as the ownership key without independently verifying that the referenced file belongs to that session. Exploitation requires a freely issued guest nonce plus the victim's session identifier and file reference; success removes the record and unlinks the backing file.

The record

CVE
CVE-2026-16953
Published
Aug 8, 2026
Updated
Aug 8, 2026
Vendor
Jordy Meow
Product
AI Engine
Classifications
CWE-639, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 8, 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 <3.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jordy Meow · AI Engineversion=0 <3.6.4

Published CVSS scores

4.8CISA ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1485Data Destruction

Public exploit references

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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