CVE-2026-56073
CRITICALCap-go - OTP Bypass via Response Manipulation in Email Verification
Title source: cnaDescription
Cap-go before 12.128.2 contains an authentication bypass vulnerability in OTP verification that allows attackers to bypass email verification by modifying server responses. Attackers can intercept OTP verification requests and manipulate HTTP responses to falsely mark verification successful, enabling unauthorized 2FA enablement and account takeover.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GHSA Advisory GHSA-x2gq-85v8-j9v4
https://github.com/Cap-go/capgo/security/advisories/GHSA-x2gq-85v8-j9v4
Third Party Advisory third-party-advisory
VulnCheck Advisory: Cap-go - OTP Bypass via Response Manipulation in Email Verification
https://www.vulncheck.com/advisories/cap-go-otp-bypass-via-response-manipulation-in-email-verification
Scores
CVSS v3
9.4
EPSS
0.0027
EPSS Percentile
19.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-345
Status
published
Products (2)
Cap-go/capgo
< 12.128.2
Cap-go/capgo
12.128.2
Published
Jun 19, 2026
Tracked Since
Jun 20, 2026