CVE-2026-18817Network attack vector

Deactivated-user token issuance via missing activity filter

Published Aug 4, 2026 · Updated Aug 4, 2026

Improper authorization in Baserow 2.3.2 and earlier allows remote authenticated users to obtain tokens for deactivated users. The BaserowImpersonateAuthTokenSerializer user query excludes superusers and staff but fails to exclude inactive accounts before the admin endpoint issues an impersonation token. Instance-administrator privileges are required, and the maintainer states that the resulting token cannot access any endpoint, leaving the claimed security impact disputed.

CVSS severity2.1
Low
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Baserow 2.3.2 and earlier allows remote authenticated users to obtain tokens for deactivated users. The BaserowImpersonateAuthTokenSerializer user query excludes superusers and staff but fails to exclude inactive accounts before the admin endpoint issues an impersonation token. Instance-administrator privileges are required, and the maintainer states that the resulting token cannot access any endpoint, leaving the claimed security impact disputed.

The record

CVE
CVE-2026-18817
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Baserow
Product
Baserow
Classifications
CWE-266
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=2.3.0
  2. Affected versionversion=2.3.1
  3. Affected versionversion=2.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Baserow · Baserowversion=2.3.0; version=2.3.1; version=2.3.2

Published CVSS scores

2.1GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/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-266Incorrect Privilege Assignment

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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