CVE-2026-18817
Baserow Inactive Non-Staff User serializers.py BaserowImpersonateAuthTokenSerializer improper authorization
Description
A security flaw has been discovered in Baserow up to 2.3.2. Affected by this issue is the function BaserowImpersonateAuthTokenSerializer of the file backend/src/baserow/api/admin/users/serializers.py of the component Inactive Non-Staff User Handler. Performing a manipulation results in improper authorization. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. The presence of this vulnerability remains uncertain at this time. Upgrading to version 2.3.3 can resolve this issue. The affected component should be upgraded. The project maintainer explains: "While the problem exists, I'm not really sure if it's a vulnerability. (....) Even though the back gives a token for a deactivate user, none of the endpoints actually work. That said, we will fix it, but so far it seems more like a bug instead of a vulnerability."
INFO
Published Date :
Aug. 4, 2026, 10:17 p.m.
Last Modified :
Aug. 4, 2026, 10:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-18817
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Upgrade Baserow to version 2.3.3 or higher.
- Update the BaserowImpersonateAuthTokenSerializer component.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18817.
| URL | Resource |
|---|---|
| https://github.com/baserow/baserow/releases/tag/2.3.3 | |
| https://vuldb.com/cve/CVE-2026-18817 | |
| https://vuldb.com/submit/857942 | |
| https://vuldb.com/vuln/385816 | |
| https://vuldb.com/vuln/385816/cti |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18817 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18817
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18817 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18817 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:baserow:baserow:*:*:*:*:*:*:*:*'], 'vendor': 'n/a', 'modules': ['Inactive Non-Staff User Handler'], 'product': 'Baserow', 'versions': [{'status': 'affected', 'version': '2.3.0'}, {'status': 'affected', 'version': '2.3.1'}, {'status': 'affected', 'version': '2.3.2'}, {'status': 'unaffected', 'version': '2.3.3'}]}] Added Tag disputed Added Description A security flaw has been discovered in Baserow up to 2.3.2. Affected by this issue is the function BaserowImpersonateAuthTokenSerializer of the file backend/src/baserow/api/admin/users/serializers.py of the component Inactive Non-Staff User Handler. Performing a manipulation results in improper authorization. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. The presence of this vulnerability remains uncertain at this time. Upgrading to version 2.3.3 can resolve this issue. The affected component should be upgraded. The project maintainer explains: "While the problem exists, I'm not really sure if it's a vulnerability. (....) Even though the back gives a token for a deactivate user, none of the endpoints actually work. That said, we will fix it, but so far it seems more like a bug instead of a vulnerability." Added CVSS V4.0 AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N Added CVSS V2 (AV:N/AC:H/Au:M/C:N/I:P/A:N) Added CWE CWE-285 Added CWE CWE-266 Added Reference https://github.com/baserow/baserow/releases/tag/2.3.3 Added Reference https://vuldb.com/cve/CVE-2026-18817 Added Reference https://vuldb.com/submit/857942 Added Reference https://vuldb.com/vuln/385816 Added Reference https://vuldb.com/vuln/385816/cti