CVE-2026-122138: blueprintue blueprintue-self-hosted-edition

BlueprintUE Self-Hosted Edition 4.2.0 before 4.3.4 Login Rate Limit Bypass

CVSS 6.3 MediumEPSS 0.0033 · 26th percentile

Published by the CVE Program (CNA: VulnCheck) at 4 Nov 2026, 20:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
blueprintue	blueprintue-self-hosted-edition pkg:github/blueprintue/blueprintue-self-hosted-edition	affected 4.2.0 to before 4.3.4 semver Other versions: unaffected

Identifiers

CVE-2026-122138

CNA

VulnCheck

Weakness (CWE)

CWE-307

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.3	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
5.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0033, the 26th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

4 Nov 2026, 20:36 UTC Confirmed by the CVE List
4 Nov 2026, 20:43 UTC First seen by agentprime
4 Nov 2026, 21:18 UTC Confirmed by NVD

Sources

References from the CNA

github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-773r-585g-6vc3 vendor-advisory
github.com/blueprintue/blueprintue-self-hosted-edition/commit/bd4af38d2f7d499be23fc4106f93980a1348ddd7 patch
github.com/blueprintue/blueprintue-self-hosted-edition/pull/267 patchissue-tracking
github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.4 release-notes
github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.3/app/middlewares/LoginMiddleware.php#L119-L158 technical-description
www.vulncheck.com/advisories/blueprintue-self-hosted-edition-4.2.0-before-4.3.4-login-rate-limit-bypass third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.