CVE-2026-40588
blueprintUE: Authenticated Password Change Does Not Verify Current Password
Description
blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, the password change form at /profile/{slug}/edit/ does not include a current_password field and does not verify the user's existing password before accepting a new one. Any attacker who obtains a valid authenticated session — through XSS exploitation, session sidejacking over HTTP, physical access to a logged-in browser, or a stolen "remember me" cookie — can immediately change the account password without knowing the original credential, resulting in permanent account takeover. This vulnerability is fixed in 4.2.0.
INFO
Published Date :
April 21, 2026, 6:16 p.m.
Last Modified :
Oct. 26, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-40588
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.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update blueprintUE to version 4.2.0 or later.
- Ensure password change forms require current password verification.
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-2026-40588.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40588 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-2026-40588
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-2026-40588 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40588 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.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: blueprintue-self-hosted-edition de blueprintue, Description: blueprintUE es una herramienta para ayudar a los desarrolladores de Unreal Engine. Antes de la versión 4.2.0, el formulario de cambio de contraseña en /profile/{slug}/edit/ no incluye un campo current_password y no verifica la contraseña existente del usuario antes de aceptar una nueva. Cualquier atacante que obtenga una sesión autenticada válida -a través de la explotación de XSS, el secuestro de sesión (session sidejacking) sobre HTTP, el acceso físico a un navegador con sesión iniciada, o una cookie ’recordarme’ robada- puede cambiar inmediatamente la contraseña de la cuenta sin conocer la credencial original, lo que resulta en una toma de control permanente de la cuenta. Esta vulnerabilidad se corrige en la versión 4.2.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'blueprintue', 'product': 'blueprintue-self-hosted-edition', 'versions': [{'status': 'affected', 'version': '< 4.2.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40588', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-22T13:20:53.842931Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 22, 2026
Action Type Old Value New Value Added Reference https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-73f2-p9jr-m44x -
New CVE Received by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added Description blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, the password change form at /profile/{slug}/edit/ does not include a current_password field and does not verify the user's existing password before accepting a new one. Any attacker who obtains a valid authenticated session — through XSS exploitation, session sidejacking over HTTP, physical access to a logged-in browser, or a stolen "remember me" cookie — can immediately change the account password without knowing the original credential, resulting in permanent account takeover. This vulnerability is fixed in 4.2.0. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-620 Added Reference https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-73f2-p9jr-m44x