LI
Product
libssh2
by libssh2 · last CVE Jul 24, 2026
25
CVEs
0
On KEV
9.1
Max CVSS
0
New 30D
Severity mix
Critical 5High 15Medium 4Low 0
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-66032
8.8
0%
Jul 24
libssh2 Double-Free Heap Corruption via sftp_open()
Affected: through 1.11.1
CVE-2019-3856
8.8
6%
Mar 25
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed
Affected: before 1.8.1
CVE-2019-3857
8.8
6%
Mar 25
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are…
Affected: 1.2.8 through 1.8.0
CVE-2019-3863
8.8
3%
Mar 25
A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side
Affected: before 1.8.1
CVE-2019-3855
8.8
9%
Mar 21
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server
Affected: before 1.8.1
CVE-2026-55200
8.3
4%
Jun 17
libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c
Affected: 1.11.1; 1c3f1b7da588f2652260285529ec3c1f1125eb4e before 97acf3dfda80c91c3a8c9f2372546301d4a1a7a8
CVE-2019-17498
8.1
4%
Oct 21
In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary…
Affected: through 1.9.0
CVE-2019-13115
8.1
12%
Jul 16
In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets…
Affected: before 1.9.0
CVE-2026-66035
7.5
0%
Jul 24
libssh2 Heap Buffer Overflow via ETM Cipher Negotiation
Affected: through 1.11.1
CVE-2026-66034
7.5
0%
Jul 24
libssh2 Heap Out-of-Bounds Read via publickey subsystem
Affected: through 1.11.1
CVE-2026-66033
7.5
1%
Jul 24
libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation
Affected: through 1.11.1
CVE-2026-58050
7.5
0%
Jun 28
libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation
Affected: through 1.11.1
CVE-2026-55199
7.5
1%
Jun 17
libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler
Affected: through 1.11.1
CVE-2020-22218
7.5
1%
Aug 22
An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory
Affected: 1.10.0
CVE-2026-7598
7.3
0%
May 1
libssh2 userauth.c userauth_password integer overflow
Affected: 1.11.0; 1.11.1
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