{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53981: Cap-go < v12.128.2 Account Takeover via Unauthenticated Email Change Mechanism","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53981","status":"final","version":"1","initial_release_date":"2026-06-12T15:42:18.383Z","current_release_date":"2026-06-12T17:24:22.841Z","revision_history":[{"date":"2026-06-12T15:42:18.383Z","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 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 password or MFA verification. Attackers can redirect verification to an attacker-controlled email address and subsequently perform a password reset to permanently take over the victim's account.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53981 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53981"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53981"},{"category":"external","summary":"github.com","url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-w56g-jv78-hf79"},{"category":"external","summary":"github.com","url":"https://github.com/Cap-go/capgo/commit/6685e5f11adef257bf3d085e481f4d8ebcec602e"},{"category":"external","summary":"vulncheck.com","url":"https://www.vulncheck.com/advisories/cap-go-account-takeover-via-unauthenticated-email-change-mechanism"}]},"product_tree":{"branches":[{"category":"vendor","name":"Cap-go","branches":[{"category":"product_name","name":"Cap-go","branches":[{"category":"product_version_range","name":"<12.128.2","product":{"name":"Cap-go Cap-go <12.128.2","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:cap-go:cap-go:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6685e5f11adef257bf3d085e481f4d8ebcec602e","product":{"name":"Cap-go Cap-go 6685e5f11adef257bf3d085e481f4d8ebcec602e","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:cap-go:cap-go:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53981","title":"Cap-go < v12.128.2 Account Takeover via Unauthenticated Email Change Mechanism","notes":[{"category":"description","text":"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 password or MFA verification. Attackers can redirect verification to an attacker-controlled email address and subsequently perform a password reset to permanently take over the victim's account.","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:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N","baseScore":7.2,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 12.128.2, 6685e5f11adef257bf3d085e481f4d8ebcec602e.","product_ids":["CSAFPID-1"],"url":"https://github.com/Cap-go/capgo/commit/6685e5f11adef257bf3d085e481f4d8ebcec602e"}]}]}