# CVE-2026-40588: blueprintUE: Authenticated Password Change Does Not Verify Current Password

> Authenticated attackers can change account passwords without verifying the current password, leading to permanent account takeover in blueprintUE.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 22 Apr 2026
- **Also known as:** GHSA-73f2-p9jr-m44x

## What is CVE-2026-40588?

CVE-2026-40588 is a high-severity vulnerability in blueprintue-self-hosted-edition, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-620 (Unverified Password Change)

## Which versions are affected by CVE-2026-40588?


## How do I fix CVE-2026-40588?

No fix has been published for CVE-2026-40588 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-40588 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40588 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40588 and fix it if it is affected.

What it is: CVE-2026-40588 is a high-severity vulnerability in blueprintue-self-hosted-edition, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40588 exists.

Affected product: blueprintue-self-hosted-edition. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40588/ (Markdown: https://insights.sbomify.com/CVE-2026-40588/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40588
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40588
- OSV: https://osv.dev/vulnerability/CVE-2026-40588

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40588/
Summaries are generated and may contain mistakes; the official description above is the record.