{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-7598: libssh2 userauth.c userauth_password integer overflow","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-7598","status":"final","version":"1","initial_release_date":"2026-05-01T21:30:11.006Z","current_release_date":"2026-06-30T03:18:30.234Z","revision_history":[{"date":"2026-05-01T21:30:11.006Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-7598 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-7598"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-7598"},{"category":"external","summary":"VDB-360555 | libssh2 userauth.c userauth_password integer overflow","url":"https://vuldb.com/vuln/360555"},{"category":"external","summary":"VDB-360555 | CTI Indicators (IOB, IOC, IOA)","url":"https://vuldb.com/vuln/360555/cti"},{"category":"external","summary":"Submit #805564 | libssh2 <= 1.11.1 Integer Overflow","url":"https://vuldb.com/submit/805564"},{"category":"external","summary":"github.com","url":"https://github.com/libssh2/libssh2/pull/1858"},{"category":"external","summary":"github.com","url":"https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1"},{"category":"external","summary":"github.com","url":"https://github.com/libssh2/libssh2/"}]},"product_tree":{"branches":[{"category":"vendor","name":"n/a","branches":[{"category":"product_name","name":"libssh2","branches":[{"category":"product_version","name":"1.11.0","product":{"name":"n/a libssh2 1.11.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:n\\/a:libssh2:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"1.11.1","product":{"name":"n/a libssh2 1.11.1","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:n\\/a:libssh2:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-7598","title":"libssh2 userauth.c userauth_password integer overflow","notes":[{"category":"description","text":"A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1","CSAFPID-2"]}]}]}