CVE-2026-25050
Vendure vulnerable to timing attack that enables user enumeration in NativeAuthenticationStrategy
Description
### Summary The `NativeAuthenticationStrategy.authenticate()` method is vulnerable to a timing attack that allows attackers to enumerate valid usernames (email addresses). ### Details In `packages/core/src/config/auth/native-authentication-strategy.ts`, the authenticate method returns immediately if a user is not found: ```typescript const user = await this.userService.getUserByEmailAddress(ctx, data.username); if (!user) { return false; // Instant return (~1-5ms) } const passwordMatch = await this.verifyUserPassword(ctx, user.id, data.password); // Password check takes ~200-400ms with bcrypt (12 rounds) ``` The significant timing difference (~200-400ms for bcrypt vs ~1-5ms for DB miss) allows attackers to reliably distinguish between existing and non-existing accounts. ### Impact - Attackers can enumerate valid user accounts - Enables targeted brute-force or phishing attacks - Information disclosure (account existence) ### Recommended Fix Perform a dummy bcrypt check when user is not found to ensure consistent response times.
How to fix CVE-2026-25050
To remediate CVE-2026-25050, upgrade the affected package to a fixed version below.
- —upgrade to 3.5.3 or later
Is CVE-2026-25050 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.5.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U |