{"schema_version":1,"title":"Libssh2 vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 11 vulnerabilities in Libssh2: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-66035, was published on 24 July 2026. 1 technology has a page of its own.","url":"https://junglewise.ai/threats/vendors/libssh2","json_url":"https://junglewise.ai/threats/vendors/libssh2.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/vendors/libssh2","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"vendor","counts":{"high":7,"all_time":11,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":4,"last_365_days":10},"latest":[{"cve":"CVE-2026-66035","cvss":7.5,"slug":"cve-2026-66035-libssh2-heap-buffer-overflow-in-transport-layer-during-etm","title":"libssh2 heap buffer overflow in transport layer during EtM negotiation","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.547+00:00","url":"https://junglewise.ai/threats/cve-2026-66035-libssh2-heap-buffer-overflow-in-transport-layer-during-etm"},{"cve":"CVE-2026-66034","cvss":7.5,"slug":"cve-2026-66034-libssh2-heap-out-of-bounds-read-in-publickey-list-fetch","title":"libssh2 heap out-of-bounds read in publickey_list_fetch","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.407+00:00","url":"https://junglewise.ai/threats/cve-2026-66034-libssh2-heap-out-of-bounds-read-in-publickey-list-fetch"},{"cve":"CVE-2026-66033","cvss":7.5,"slug":"cve-2026-66033-libssh2-integer-underflow-in-ssh2-cipher-crypt","title":"libssh2 integer underflow in ssh2_cipher_crypt","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.263+00:00","url":"https://junglewise.ai/threats/cve-2026-66033-libssh2-integer-underflow-in-ssh2-cipher-crypt"},{"cve":"CVE-2026-66032","cvss":8.8,"slug":"cve-2026-66032-libssh2-double-free-in-sftp-open","title":"libssh2 double free in sftp_open","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.12+00:00","url":"https://junglewise.ai/threats/cve-2026-66032-libssh2-double-free-in-sftp-open"},{"cve":"CVE-2026-58051","cvss":6.5,"slug":"cve-2026-58051-libssh2-uninitialized-pointer-free-in-publickey-list-cleanup","title":"libssh2 uninitialized pointer free in publickey list cleanup","severity":"medium","exploited":false,"published_at":"2026-06-28T02:16:32.153+00:00","url":"https://junglewise.ai/threats/cve-2026-58051-libssh2-uninitialized-pointer-free-in-publickey-list-cleanup"},{"cve":"CVE-2026-58050","cvss":7,"slug":"cve-2026-58050-libssh2-heap-buffer-overflow-in-publickey-subsystem-attribute","title":"libssh2 heap buffer overflow in publickey-subsystem attribute allocation","severity":"high","exploited":false,"published_at":"2026-06-28T02:16:32.017+00:00","url":"https://junglewise.ai/threats/cve-2026-58050-libssh2-heap-buffer-overflow-in-publickey-subsystem-attribute"},{"cve":"CVE-2025-15661","cvss":6.5,"slug":"cve-2025-15661-libssh2-out-of-bounds-heap-read-in-sftp-symlink","title":"libssh2 out-of-bounds heap read in sftp_symlink","severity":"medium","exploited":false,"published_at":"2026-06-18T21:16:27.143+00:00","url":"https://junglewise.ai/threats/cve-2025-15661-libssh2-out-of-bounds-heap-read-in-sftp-symlink"},{"cve":"CVE-2026-55200","cvss":8.1,"epss":0.0055,"slug":"cve-2026-55200-libssh2-out-of-bounds-write-in-ssh2-transport-read","title":"libssh2 out-of-bounds write in ssh2_transport_read","severity":"high","exploited":false,"published_at":"2026-06-17T20:17:28.667+00:00","url":"https://junglewise.ai/threats/cve-2026-55200-libssh2-out-of-bounds-write-in-ssh2-transport-read"},{"cve":"CVE-2026-55199","cvss":5.9,"epss":0.0038,"slug":"cve-2026-55199-libssh2-cpu-exhaustion-in-ssh-msg-ext-info-handler","title":"libssh2 CPU exhaustion in SSH_MSG_EXT_INFO handler","severity":"medium","exploited":false,"published_at":"2026-06-17T20:17:28.52+00:00","url":"https://junglewise.ai/threats/cve-2026-55199-libssh2-cpu-exhaustion-in-ssh-msg-ext-info-handler"},{"cve":"CVE-2026-7598","cvss":7.3,"epss":0.0036,"slug":"cve-2026-7598-libssh2-integer-overflow-in-userauth-password","title":"libssh2 integer overflow in userauth_password","severity":"high","exploited":false,"published_at":"2026-05-01T22:16:16.947+00:00","url":"https://junglewise.ai/threats/cve-2026-7598-libssh2-integer-overflow-in-userauth-password"},{"cve":"CVE-2023-48795","cvss":5.9,"epss":0.9331,"slug":"cve-2023-48795-openssh-and-others-ssh-prefix-truncation-vulnerability-terrapin","title":"OpenSSH and others SSH prefix truncation vulnerability (Terrapin)","severity":"medium","exploited":false,"published_at":"2023-12-18T16:15:10.897+00:00","url":"https://junglewise.ai/threats/cve-2023-48795-openssh-and-others-ssh-prefix-truncation-vulnerability-terrapin"}],"vendor":{"hub":true,"name":"Libssh2","slug":"libssh2","homepage":"https://www.libssh2.org/","description":"A software project providing a C library for the SSH2 protocol.","url":"https://junglewise.ai/threats/vendors/libssh2"},"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":4},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"most_severe":[{"cve":"CVE-2026-66032","cvss":8.8,"slug":"cve-2026-66032-libssh2-double-free-in-sftp-open","title":"libssh2 double free in sftp_open","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.12+00:00","url":"https://junglewise.ai/threats/cve-2026-66032-libssh2-double-free-in-sftp-open"},{"cve":"CVE-2026-55200","cvss":8.1,"epss":0.0055,"slug":"cve-2026-55200-libssh2-out-of-bounds-write-in-ssh2-transport-read","title":"libssh2 out-of-bounds write in ssh2_transport_read","severity":"high","exploited":false,"published_at":"2026-06-17T20:17:28.667+00:00","url":"https://junglewise.ai/threats/cve-2026-55200-libssh2-out-of-bounds-write-in-ssh2-transport-read"},{"cve":"CVE-2026-66035","cvss":7.5,"slug":"cve-2026-66035-libssh2-heap-buffer-overflow-in-transport-layer-during-etm","title":"libssh2 heap buffer overflow in transport layer during EtM negotiation","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.547+00:00","url":"https://junglewise.ai/threats/cve-2026-66035-libssh2-heap-buffer-overflow-in-transport-layer-during-etm"},{"cve":"CVE-2026-66034","cvss":7.5,"slug":"cve-2026-66034-libssh2-heap-out-of-bounds-read-in-publickey-list-fetch","title":"libssh2 heap out-of-bounds read in publickey_list_fetch","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.407+00:00","url":"https://junglewise.ai/threats/cve-2026-66034-libssh2-heap-out-of-bounds-read-in-publickey-list-fetch"},{"cve":"CVE-2026-66033","cvss":7.5,"slug":"cve-2026-66033-libssh2-integer-underflow-in-ssh2-cipher-crypt","title":"libssh2 integer underflow in ssh2_cipher_crypt","severity":"high","exploited":false,"published_at":"2026-07-24T17:17:35.263+00:00","url":"https://junglewise.ai/threats/cve-2026-66033-libssh2-integer-underflow-in-ssh2-cipher-crypt"},{"cve":"CVE-2026-7598","cvss":7.3,"epss":0.0036,"slug":"cve-2026-7598-libssh2-integer-overflow-in-userauth-password","title":"libssh2 integer overflow in userauth_password","severity":"high","exploited":false,"published_at":"2026-05-01T22:16:16.947+00:00","url":"https://junglewise.ai/threats/cve-2026-7598-libssh2-integer-overflow-in-userauth-password"},{"cve":"CVE-2026-58050","cvss":7,"slug":"cve-2026-58050-libssh2-heap-buffer-overflow-in-publickey-subsystem-attribute","title":"libssh2 heap buffer overflow in publickey-subsystem attribute allocation","severity":"high","exploited":false,"published_at":"2026-06-28T02:16:32.017+00:00","url":"https://junglewise.ai/threats/cve-2026-58050-libssh2-heap-buffer-overflow-in-publickey-subsystem-attribute"},{"cve":"CVE-2026-58051","cvss":6.5,"slug":"cve-2026-58051-libssh2-uninitialized-pointer-free-in-publickey-list-cleanup","title":"libssh2 uninitialized pointer free in publickey list cleanup","severity":"medium","exploited":false,"published_at":"2026-06-28T02:16:32.153+00:00","url":"https://junglewise.ai/threats/cve-2026-58051-libssh2-uninitialized-pointer-free-in-publickey-list-cleanup"},{"cve":"CVE-2025-15661","cvss":6.5,"slug":"cve-2025-15661-libssh2-out-of-bounds-heap-read-in-sftp-symlink","title":"libssh2 out-of-bounds heap read in sftp_symlink","severity":"medium","exploited":false,"published_at":"2026-06-18T21:16:27.143+00:00","url":"https://junglewise.ai/threats/cve-2025-15661-libssh2-out-of-bounds-heap-read-in-sftp-symlink"},{"cve":"CVE-2023-48795","cvss":5.9,"epss":0.9331,"slug":"cve-2023-48795-openssh-and-others-ssh-prefix-truncation-vulnerability-terrapin","title":"OpenSSH and others SSH prefix truncation vulnerability (Terrapin)","severity":"medium","exploited":false,"published_at":"2023-12-18T16:15:10.897+00:00","url":"https://junglewise.ai/threats/cve-2023-48795-openssh-and-others-ssh-prefix-truncation-vulnerability-terrapin"}],"generated_at":"2026-09-26T10:07:00.179841+00:00","technologies":[{"name":"Libssh2","slug":"libssh2","vulnerabilities":11,"url":"https://junglewise.ai/threats/technologies/libssh2"}]}