Known Vulnerabilities for Libssh2 by The Libssh2 Project

Listed below are 10 of the newest known vulnerabilities associated with "Libssh2" by "The Libssh2 Project".

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

Data on known vulnerable versions is also displayed based on information from known CPEs

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 2026-07-28
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 2026-07-28
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 2026-07-28
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 2026-07-28
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 libgit2 versions before 1.8.7 and 1.9.0 before 1.9.7 built with the libssh2 SSH backend (USE_SSH=libssh2) contain a shell com... 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 2026-09-24
CVE-2023-48795 json The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote att... Not Provided 2023-12-18 2026-10-15
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
Results limited to 10 most recent vulnerabilities

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