PT-2026-37110 · Unknown · @Sync-In/Server

Ppfeister · Published 2026-04-15 · Updated 2026-05-12 · CVE-2026-41161

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Sync-in Server versions prior to 2.2.0

Description A logic flaw in the "/api/auth/login" endpoint allows unauthenticated remote attackers to enumerate valid usernames by measuring the application's response time. This timing discrepancy occurs because the application responds faster when a username does not exist compared to when a valid username is provided, as the backend short-circuits the process when no matching user is found.

Recommendations Update to version 2.2.0.

Exploit

Fix

Weakness Enumeration

CWE-208

Related Identifiers

CVE-2026-41161

GHSA-43FJ-QP3H-HRH5

Affected Products

@Sync-In/Server

References · 7

• 🔥 https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5 · Exploit
• https://github.com/Sync-in/server/releases/tag/v2.2.0 · Patch
• https://osv.dev/vulnerability/GHSA-43fj-qp3h-hrh5 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41161 · Security Note
• https://github.com/Sync-in/server · Note
• https://t.me/cveNotify/163230 · Telegram Post
• https://twitter.com/CVEnew/status/2053174670065549708 · Twitter Post