Known Vulnerabilities for products from Libssh2

Listed below are 20 of the newest known vulnerabilities associated with the vendor "Libssh2".

These CVEs are retrieved based on exact matches on listed vendor information (CPE data) as well as a keyword search to ensure the newest vulnerabilities with no officially listed vendor information are still displayed.

Data on known vulnerable products is also displayed based on information from known CPEs, each product links to its respective vulnerability page.

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-66035 json libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow vulnerability that allows... Not Provided 2026-07-24 2026-07-30
CVE-2026-66034 json libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH se... Not Provided 2026-07-24 2026-07-30
CVE-2026-66033 json libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2_ci... Not Provided 2026-07-24 2026-07-30
CVE-2026-66032 json libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open() function in src/sftp... Not Provided 2026-07-24 2026-08-07
CVE-2026-58051 json libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing pop... Not Provided 2026-06-28 2026-06-30
CVE-2026-58050 json libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in... Not Provided 2026-06-28 2026-06-30
CVE-2026-55200 json libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that f... Not Provided 2026-06-17 2026-09-17
CVE-2026-55199 json libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG... Not Provided 2026-06-17 2026-07-14
CVE-2026-7598 json A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of... Not Provided 2026-05-01 2026-09-01
CVE-2026-5917 json Not Provided 2026-08-11 2026-08-26
CVE-2025-15661 json libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the sftp_symlink() func... Not Provided 2026-06-18 2026-10-12
CVE-2023-48795 json Not Provided 2023-12-18 2026-10-15
CVE-2023-6918 json 5.3 - MEDIUM 2023-12-19 2024-01-04
CVE-2020-22218 json An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory. Not Provided 2023-08-22 2026-10-14
CVE-2019-17498 json In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, e... Not Provided 2019-10-21 2026-10-14
CVE-2019-13115 json In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that c... 8.1 - HIGH 2019-07-16 2023-11-07
CVE-2019-3863 json A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyb... Not Provided 2019-03-25 2026-10-14
CVE-2019-3862 json An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit sta... Not Provided 2019-03-21 2026-10-14
CVE-2019-3861 json An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater ... Not Provided 2019-03-25 2026-10-14
CVE-2019-3860 json An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A r... Not Provided 2019-03-25 2026-10-14
Results limited to 20 most recent vulnerabilities

Known software with vulnerabilities from Libssh2

Type Vendor Product Version
ApplicationLibssh2Libssh20.1

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