{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-56081: Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-56081","status":"final","version":"1","initial_release_date":"2026-06-19T21:39:20.935Z","current_release_date":"2026-06-19T21:39:20.935Z","revision_history":[{"date":"2026-06-19T21:39:20.935Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Cap-go before 12.128.2 contains an authentication logic flaw that lets an attacker register and control an account bound to a victim's email address before that email is verified. By enabling two-factor authentication on the pre-registered account, the attacker gains control over the account claimed under the victim's identity, allowing them to read and modify its state and enforce organization-level policies, while the legitimate user is denied access to the account tied to their own email.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-56081 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-56081"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-56081"},{"category":"external","summary":"GHSA Advisory GHSA-j4cx-5pw6-5v5j","url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-j4cx-5pw6-5v5j"},{"category":"external","summary":"VulnCheck Advisory: Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email","url":"https://www.vulncheck.com/advisories/cap-go-account-lockout-via-2fa-misconfiguration-on-unverified-email"}]},"product_tree":{"branches":[{"category":"vendor","name":"Cap-go","branches":[{"category":"product_name","name":"capgo","branches":[{"category":"product_version_range","name":"<12.128.2","product":{"name":"Cap-go capgo <12.128.2","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:cap-go:capgo:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"12.128.2","product":{"name":"Cap-go capgo 12.128.2","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:cap-go:capgo:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-56081","title":"Cap-go - Account Lockout via 2FA Misconfiguration on Unverified Email","notes":[{"category":"description","text":"Cap-go before 12.128.2 contains an authentication logic flaw that lets an attacker register and control an account bound to a victim's email address before that email is verified. By enabling two-factor authentication on the pre-registered account, the attacker gains control over the account claimed under the victim's identity, allowing them to read and modify its state and enforce organization-level policies, while the legitimate user is denied access to the account tied to their own email.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"],"fixed":["CSAFPID-2"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","baseScore":9.3,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 12.128.2.","product_ids":["CSAFPID-1"]}]}]}