Vendor
Libssh2 vulnerabilities
Updated . Rebuilt every hour.
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.
- Last 7 days
- 0
- Last 90 days
- 4
- Critical, all time
- 0
- Exploited in the wild
- 0
About Libssh2
A software project providing a C library for the SSH2 protocol.
Libssh2 technologies
- Libssh211
Latest Libssh2 vulnerabilities
- CVE-2026-66035: libssh2 heap buffer overflow in transport layer during EtM negotiationhighCVSS 7.5
- CVE-2026-66034: libssh2 heap out-of-bounds read in publickey_list_fetchhighCVSS 7.5
- CVE-2026-66033: libssh2 integer underflow in ssh2_cipher_crypthighCVSS 7.5
- CVE-2026-66032: libssh2 double free in sftp_openhighCVSS 8.8
- CVE-2026-58051: libssh2 uninitialized pointer free in publickey list cleanupmediumCVSS 6.5
- CVE-2026-58050: libssh2 heap buffer overflow in publickey-subsystem attribute allocationhighCVSS 7
- CVE-2025-15661: libssh2 out-of-bounds heap read in sftp_symlinkmediumCVSS 6.5
- CVE-2026-55200: libssh2 out-of-bounds write in ssh2_transport_readhighCVSS 8.1EPSS 0.5%
- CVE-2026-55199: libssh2 CPU exhaustion in SSH_MSG_EXT_INFO handlermediumCVSS 5.9EPSS 0.4%
- CVE-2026-7598: libssh2 integer overflow in userauth_passwordhighCVSS 7.3EPSS 0.4%
- CVE-2023-48795: OpenSSH and others SSH prefix truncation vulnerability (Terrapin)mediumCVSS 5.9EPSS 93.3%
Most severe Libssh2 vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-66032: libssh2 double free in sftp_openhighCVSS 8.8
- CVE-2026-55200: libssh2 out-of-bounds write in ssh2_transport_readhighCVSS 8.1EPSS 0.5%
- CVE-2026-66035: libssh2 heap buffer overflow in transport layer during EtM negotiationhighCVSS 7.5
- CVE-2026-66034: libssh2 heap out-of-bounds read in publickey_list_fetchhighCVSS 7.5
- CVE-2026-66033: libssh2 integer underflow in ssh2_cipher_crypthighCVSS 7.5
- CVE-2026-7598: libssh2 integer overflow in userauth_passwordhighCVSS 7.3EPSS 0.4%
- CVE-2026-58050: libssh2 heap buffer overflow in publickey-subsystem attribute allocationhighCVSS 7
- CVE-2026-58051: libssh2 uninitialized pointer free in publickey list cleanupmediumCVSS 6.5
- CVE-2025-15661: libssh2 out-of-bounds heap read in sftp_symlinkmediumCVSS 6.5
- CVE-2023-48795: OpenSSH and others SSH prefix truncation vulnerability (Terrapin)mediumCVSS 5.9EPSS 93.3%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 4 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/libssh2.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Libssh2 vulnerabilities", https://junglewise.ai/threats/vendors/libssh2, 26 September 2026.