EUVD Vulnerability Catalog
EUVD-2026-121241
Severity: CRITICAL
Base Score: 9.1
CVSS Version: 4.0
Vulnerability Description
Aptabase before commit 61d4c01 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge sign-in links by using the publicly known example AUTH_SECRET. Attackers can enumerate registered e-mails via /api/_auth/signin, forge HS256 JWTs redeemed by /api/_auth/continue, impersonate users, export analytics data, and transfer app ownership.
CVSS Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
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Attack Vector (AV): Network
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Attack Complexity (AC): Low
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Attack Requirements (AT): Present
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Privileges Required (PR): None
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User Interaction (UI): None
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Vulnerability Confidentiality Impact (VC): High
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Vulnerability Integrity Impact (VI): High
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Vulnerability Availability Impact (VA): None
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Subsequent Confidentiality Impact (SC): None
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Subsequent Integrity Impact (SI): None
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Subsequent Availability Impact (SA): None
Affected Vendors & Systems
Vendor
aptabase
References & Advisory Links
- https://github.com/aptabase/aptabase/security/advisories/GHSA-gc76-cqm4-vqcf
- https://github.com/aptabase/aptabase/commit/61d4c01298a706d575265461ac07bb956ca7b8d2
- https://github.com/aptabase/aptabase/pull/204
- https://github.com/aptabase/self-hosting/commit/b79a472419ff17e485d0bd5b4adf1b1ef2b9953c
- https://www.vulncheck.com/advisories/aptabase-before-commit-61d4c01-authentication-bypass-via-known-example-auth-secret
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
VulnCheck
EPSS Probability
0.34
Known Aliases
GHSA-q925-46h4-fq6w
CVE-2026-125758
Published On
2026-11-10
Last Updated
2026-11-14