CVE-2026-81818Network attack vectorHinoki check available

Administrator takeover via missing role boundary check

Published Aug 27, 2026 · Updated Aug 27, 2026

Privilege escalation in Flowintel 3.3.0 and earlier allows remote authenticated users to take over a full administrator account. The administrative user-edit API checks organization membership but fails to block an organization administrator from editing an account whose is_admin() state marks it as a full administrator. Organization-administrator access and a full administrator in the same organization are required; changing that account's password enables takeover of its higher privileges.

CVSS severity8.6
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Privilege escalation in Flowintel 3.3.0 and earlier allows remote authenticated users to take over a full administrator account. The administrative user-edit API checks organization membership but fails to block an organization administrator from editing an account whose is_admin() state marks it as a full administrator. Organization-administrator access and a full administrator in the same organization are required; changing that account's password enables takeover of its higher privileges.

The record

CVE
CVE-2026-81818
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Computer Incident Response Center Luxembourg (CIRCL)
Product
Flowintel
Classifications
CWE-269, T1098
Attack vector
network
Privileges
admin

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 privilegesadmin

What is affected?

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

Published CVSS scores

8.6CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1098Account 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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