What is CVE-2026-53981?

CVE-2026-53981 is a high-severity vulnerability in Cap-go, classified under Missing Authentication for Critical Function. CVSS score: 7.6/10. Published 2026-06-12.

How severe is CVE-2026-53981?

High severity. CVSS v3 base score is 7.6 out of 10.

Auth bypass in Cap-go

CVE-2026-53981

Cap-go prior to 12.128.2 contains an account takeover vulnerability in its email change mechanism that allows an attacker with temporary authenticated session access to change the registered email address without re-authentication such as…

Vulnerability class: Broken Authentication

EPSS: 0.003 (18.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.

Affected products

Cap-go — versions 0, 6685e5f11adef257bf3d085e481f4d8ebcec602e

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53981?: CVE-2026-53981 is a high-severity vulnerability in Cap-go, classified under Missing Authentication for Critical Function. CVSS score: 7.6/10. Published 2026-06-12.
How severe is CVE-2026-53981?: High severity. CVSS v3 base score is 7.6 out of 10.