CVE-2026-81817Network attack vectorHinoki check available

Cross-case task modification via unbound task identifiers

Published Aug 27, 2026 · Updated Aug 27, 2026

Authorization bypass in Flowintel 3.3.0 and earlier allows remote authenticated users to modify tasks belonging to other cases. Task endpoints accept case and task identifiers without verifying that the task belongs to the supplied case; note reads and exports also omit task ownership checks. Editor-level access to one case is sufficient to read, alter, export, or delete task data in another case.

CVSS severity7.2
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in Flowintel 3.3.0 and earlier allows remote authenticated users to modify tasks belonging to other cases. Task endpoints accept case and task identifiers without verifying that the task belongs to the supplied case; note reads and exports also omit task ownership checks. Editor-level access to one case is sufficient to read, alter, export, or delete task data in another case.

The record

CVE
CVE-2026-81817
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Computer Incident Response Center Luxembourg (CIRCL)
Product
Flowintel
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 <=3.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Computer Incident Response Center Luxembourg (CIRCL) · Flowintelversion=0 <=3.3.0

Published CVSS scores

7.2CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

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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