CVE-2026-125758 (CVSS 7.4)

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.

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CVSS v3.1 Score

7.4

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0034

Probability of exploitation

0.28%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1188 CWE-1188

References

Other References

https://github.com/aptabase/aptabase/commit/61d4c01298a706d575265461ac07bb956ca7b8d2 https://github.com/aptabase/aptabase/pull/204 https://github.com/aptabase/aptabase/security/advisories/GHSA-gc76-cqm4-vqcf https://github.com/aptabase/self-hosting/commit/b79a472419ff17e485d0bd5b4adf1b1ef2b9953c https://www.vulncheck.com/advisories/aptabase-before-commit-61d4c01-authentication-bypass-via-known-example-auth-secret

Frequently Asked Questions

What is CVE-2026-125758? +

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. It has a CVSS v3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-125758? +

CVE-2026-125758 has a CVSS v3.1 score of 7.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0034, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-125758? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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