Answer in brief
CVE-2026-121735 records a Medium severity (CVSS 6.3) vulnerability in blueprintUE Self-Hosted Edition before 4.3.4 Non-Expiring Account Confirmation Tokens. The current sources do not mark it as known exploited. The current feed maps blueprintue/blueprintue-self-hosted-edition (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps blueprintue/blueprintue-self-hosted-edition (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| blueprintue/blueprintue-self-hosted-editiongeneric | >=0 <4.3.4 | 4.3.4 |
Published upstream
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 3, 2026
blueprintUE self-hosted edition before 4.3.4 contains an insufficient session expiration vulnerability that allows attackers to confirm accounts using stale tokens because UserModel::findUserIDWithConfirmedToken ignores confirmed_sent_at. Attackers who obtain an old confirmation link from a compromised mailbox, backup, or forwarded mail can activate unconfirmed accounts and evade the unconfirmed-account cleanup job.
Quoted source text, attributed separately from HOL analysis.