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Vulnerability details: VCID-x68j-5gck-1uge
Vulnerability ID VCID-x68j-5gck-1uge
Aliases CVE-2026-41161
GHSA-43fj-qp3h-hrh5
Summary Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.2.0, the /api/auth/login endpoint contains a logic flaw that allows unauthenticated remote attackers to enumerate valid usernames by measuring the application's response time. This issue has been patched in version 2.2.0.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-208 Observable Timing Discrepancy
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2026-41161
cvssv4 6.9 https://github.com/Sync-in/server
generic_textual MODERATE https://github.com/Sync-in/server
cvssv4 6.9 https://github.com/Sync-in/server/releases/tag/v2.2.0
generic_textual MODERATE https://github.com/Sync-in/server/releases/tag/v2.2.0
ssvc Track https://github.com/Sync-in/server/releases/tag/v2.2.0
cvssv4 6.9 https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
generic_textual MODERATE https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
ssvc Track https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
cvssv4 6.9 https://nvd.nist.gov/vuln/detail/CVE-2026-41161
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-41161
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-41161
https://nvd.nist.gov/vuln/detail/CVE-2026-41161
GHSA-43fj-qp3h-hrh5 https://github.com/advisories/GHSA-43fj-qp3h-hrh5
GHSA-43fj-qp3h-hrh5 https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
v2.2.0 https://github.com/Sync-in/server/releases/tag/v2.2.0
No exploits are available.
Vector: 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 Found at https://github.com/Sync-in/server
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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Vector: 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 Found at https://github.com/Sync-in/server/releases/tag/v2.2.0
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-11T18:23:52Z/ Found at https://github.com/Sync-in/server/releases/tag/v2.2.0
Vector: 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 Found at https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

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passive

active

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none

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-11T18:23:52Z/ Found at https://github.com/Sync-in/server/security/advisories/GHSA-43fj-qp3h-hrh5
Vector: 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 Found at https://nvd.nist.gov/vuln/detail/CVE-2026-41161
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

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Exploit Prediction Scoring System (EPSS)
Percentile 0.15487
EPSS Score 0.00048
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:51:17.245908+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/41xxx/CVE-2026-41161.json 38.6.0