libssh2

Version: 1.11.1

the SSH library

Install package

min add libssh2

Libraryclibssh2scp

Updated 2 months ago

Supply chain security: 92
Advisories: 10
Quality: 55
Maintenance: 100
Licence: 100

What is "libssh2"?

the SSH library

How to use this package

Quick install

Installs the package into the current environment for this session. Use --build or --runtime to persist it as a build-time or runtime dependency.

min add libssh2

Declare as a task dependency in minimal.toml

Listing the package under tasks.<name>.packages makes it available inside that task’s sandbox.

[tasks.dev]
packages = ["libssh2"]

Build-time vs runtime

Choose build-time for tools needed during compilation, runtime for dynamic libraries loaded at runtime.

min add --build libssh2
min add --runtime libssh2

Compare versions

Dependencies (8)

Dependencies
Name	Version	Kind
base	—	build
cmake	4.4.0	build
glibc CVE:2	2.44	runtime
make	4.4.1	build
openssl	3.6.3	build + runtime
pkgconf	3.0.4	build
toolchain	—	build
zlib	1.3.2	build + runtime

Dependency changes

Include transitive

Showing 16 advisories, 2 of which are transitive via libssh2's dependencies

Security advisories for this package
	Status	IDs	Package	Version	Severity	Published
Critical (1)
	Under investigation	CVE-2026-55200	libssh2	1.10.0 – 1.11.1	Critical	last month
Summary libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55200.json, https://nvd.nist.gov/vuln/detail/CVE-2026-55200, https://www.vulncheck.com/advisories/libssh2-out-of-bounds-write-via-unchecked-packet-length-in-transport-c Fix: https://github.com/libssh2/libssh2/commit/97acf3dfda80c91c3a8c9f2372546301d4a1a7a8 Report: https://github.com/libssh2/libssh2/pull/2052 Evidence: https://web.archive.org/web/20260623211210/https://github.com/bikini/exploitarium/tree/main/libssh2-cve-2026-55200-poc PACKAGE: https://github.com/libssh2/libssh2
High (9)
	Status	IDs	Package	Version	Severity	Published
	Under investigation	CVE-2026-66035	libssh2	1.10.0 – 1.11.1	High	6 days ago
Summary libssh2 Heap Buffer Overflow via ETM Cipher Negotiation Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66035.json, https://nvd.nist.gov/vuln/detail/CVE-2026-66035, https://www.vulncheck.com/advisories/libssh2-heap-buffer-overflow-via-etm-cipher-negotiation Fix: https://github.com/libssh2/libssh2/commit/42e33d81577ed4b95d4b4f6f845e5ee8efe5eeb4, https://github.com/libssh2/libssh2/pull/2198 PACKAGE: https://github.com/libssh2/libssh2
	Under investigation	CVE-2026-66034	libssh2	1.10.0 – 1.11.1	High	6 days ago
Summary libssh2 Heap Out-of-Bounds Read via publickey subsystem Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66034.json, https://nvd.nist.gov/vuln/detail/CVE-2026-66034, https://www.vulncheck.com/advisories/libssh2-heap-out-of-bounds-read-via-publickey-subsystem Fix: https://github.com/libssh2/libssh2/commit/a13bb6c773f0d55ad1628cede57e99803cd898d9, https://github.com/libssh2/libssh2/pull/2202 PACKAGE: https://github.com/libssh2/libssh2
	Under investigation	CVE-2026-66033	libssh2	1.10.0 – 1.11.1	High	6 days ago
Summary libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66033.json, https://nvd.nist.gov/vuln/detail/CVE-2026-66033, https://www.vulncheck.com/advisories/libssh2-integer-underflow-dos-via-aes-gcm-cipher-negotiation Fix: https://github.com/libssh2/libssh2/commit/a2ed82d40964bbc0d64cd717aa0a5a892117d2e6, https://github.com/libssh2/libssh2/pull/2401 PACKAGE: https://github.com/libssh2/libssh2
	Under investigation	CVE-2026-66032	libssh2	1.10.0 – 1.11.1	High	6 days ago
Summary libssh2 Double-Free Heap Corruption via sftp_open() Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66032.json, https://nvd.nist.gov/vuln/detail/CVE-2026-66032, https://www.vulncheck.com/advisories/libssh2-double-free-heap-corruption-via-sftp-open Fix: https://github.com/libssh2/libssh2/commit/5e4776146552d898b9c0e1b313cd093fa8dc92d0, https://github.com/libssh2/libssh2/pull/2180 PACKAGE: https://github.com/libssh2/libssh2
	Under investigation	CVE-2026-58051	libssh2	1.10.0 – 1.11.1	High	last month
Summary libssh2 - Free of Uninitialized Pointer in publickey List Cleanup Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58051.json, https://nvd.nist.gov/vuln/detail/CVE-2026-58051, https://www.vulncheck.com/advisories/libssh2-free-of-uninitialized-pointer-in-publickey-list-cleanup Evidence: https://github.com/bikini/exploitarium/tree/main/libssh2-publickey-list-calc-poc Web: https://github.com/libssh2/libssh2/blob/master/src/publickey.c
	Under investigation	CVE-2026-58050	libssh2	1.10.0 – 1.11.1	High	last month
Summary libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58050.json, https://nvd.nist.gov/vuln/detail/CVE-2026-58050, https://www.vulncheck.com/advisories/libssh2-integer-overflow-in-publickey-subsystem-attribute-allocation Evidence: https://github.com/bikini/exploitarium/tree/main/libssh2-publickey-list-calc-poc Web: https://github.com/libssh2/libssh2/blob/master/src/publickey.c
	Under investigation	CVE-2025-15661	libssh2	1.10.0 – 1.11.1	High	last month
Summary libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15661.json, https://nvd.nist.gov/vuln/detail/CVE-2025-15661, https://www.vulncheck.com/advisories/libssh2-heap-buffer-over-read-via-sftp-symlink-in-sftp-c Fix: https://github.com/libssh2/libssh2/commit/2dae3024897e1898d389835151f4e9606227721d Report: https://github.com/libssh2/libssh2/pull/1705, https://github.com/libssh2/libssh2/pull/1717 PACKAGE: https://github.com/libssh2/libssh2
	Under investigation	CVE-2026-55199	libssh2	1.10.0 – 1.11.1	High	last month
Summary libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler Affected ranges 1.10.0 – 1.11.1 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55199.json, https://nvd.nist.gov/vuln/detail/CVE-2026-55199, https://www.vulncheck.com/advisories/libssh2-pre-authentication-dos-via-ssh-msg-ext-info-handler Fix: https://github.com/libssh2/libssh2/commit/17626857d20b3c9a1addfa45979dadcee1cd84a4 Report: https://github.com/libssh2/libssh2/pull/1864 PACKAGE: https://github.com/libssh2/libssh2
	Under investigation	CVE-2026-5435	glibc	2.42 – 2.44	High: 7.3	3 months ago
Summary The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records. Via glibc Affected ranges 2.42 – 2.44 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Medium (1)
	Status	IDs	Package	Version	Severity	Published
	Under investigation	CVE-2026-6238	glibc	2.42 – 2.44	Medium: 6.5	3 months ago
Summary The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.0.1 to version 2.43 fail to validate the RDATA content against the RDATA length in a DNS response when processing A6, CERT, LOC, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a target application to crash or read uninitialized memory. These functions are for application debugging only and hence not in the path of code executed by the DNS resolver. Further, they have been deprecated since version 2.34 and should not be used by any new applications. Applications should consider porting away from these interfaces since they may be removed in future versions. Via glibc Affected ranges 2.42 – 2.44 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Low (0)
	Status	IDs	Package	Version	Severity	Published
Unknown (5)
	Status	IDs	Package	Version	Severity	Published
	Fix unavailable	OSV-2025-433	libssh2	1.11.1	Unknown	last year
Summary Null-dereference READ in _libssh2_packet_add Affected ranges 1.11.1 References Report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=422217191
	Affected: 1.11.1	OSV-2025-92	libssh2	1.11.0 – 1.11.1	Unknown	last year
Summary Null-dereference READ in session_startup Affected ranges 1.11.0 – 1.11.1 References Report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=393523566
	Affected: 1.11.1	OSV-2025-90	libssh2	1.11.0 – 1.11.1	Unknown	last year
Summary Null-dereference READ in ubsan_GetStackTrace Affected ranges 1.11.0 – 1.11.1 References Report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=393411531
	Affected: 1.11.1	OSV-2024-847	libssh2	1.11.1	Unknown	2 years ago
Summary Null-dereference READ in _libssh2_packet_add Affected ranges 1.11.1 References Report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=69234
	Affected: 1.11.1	OSV-2022-24	libssh2	1.11.0 – 1.11.1	Unknown	5 years ago
Summary Null-dereference READ in session_startup Affected ranges 1.11.0 – 1.11.1 References Report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=43419

56 components

Software Bill of Materials — every package this build depends on
Packages	Version	Repository	Licence
libssh2ROOT	1.11.1	github.com/libssh2/libssh2	BSD-3-Clause
acl	2.4.0	https://storage.googleapis.com/minimal-staging-archives/acl-2.4.0.tar.xzMIRROR	(GPL-2.0-only AND LGPL-2.1-only)
attr	2.6.0	https://storage.googleapis.com/minimal-staging-archives/attr-2.6.0.tar.gzMIRROR	(GPL-2.0-only AND LGPL-2.1-only)
autoconf	2.73	www.gnu.org/software/autoconf	GPL-3.0-or-later WITH Autoconf-exception-3.0
automake	1.18.1	www.gnu.org/software/automake	GPL-2.0-only
bash	5.3	www.gnu.org/software/bash	GPL-3.0-only
bash-bootstrap	5.3	www.gnu.org/software/bash	GPL-3.0-only
binutils	2.47	www.gnu.org/software/binutils	(GPL-2.0-only AND GPL-3.0-only AND LGPL-2.0-only)
bison	3.8.2	www.gnu.org/software/bison	GPL-3.0-only
bzip2	1.0.8	github.com/libarchive/bzip2	bzip2-1.0.6
cmake	4.4.0	github.com/Kitware/CMake	BSD-3-Clause
coreutils	9.11	www.gnu.org/software/coreutils	GPL-3.0-only
curl	8.21.0	github.com/curl/curl	curl
diffutils	3.12	www.gnu.org/software/diffutils	GPL-3.0-only
expat	2.8.2	github.com/libexpat/libexpat	MIT
file	5.48	https://storage.googleapis.com/minimal-staging-archives/file-5.48.tar.gzMIRROR	BSD-2-Clause-Darwin
findutils	4.11.0	www.gnu.org/software/findutils	GPL-3.0-only
flex	2.6.4	github.com/westes/flex	BSD-3-Clause-flex
gawk	5.4.1	www.gnu.org/software/gawk	GPL-3.0-only
gawk-bootstrap	5.4.1	www.gnu.org/software/gawk	GPL-3.0-only
gcc	15.2.0	www.gnu.org/software/gcc	(GPL-2.0-only AND GPL-3.0-only AND LGPL-2.1-only)
gdbm	1.26	www.gnu.org/software/gdbm	GPL-3.0-only
glibc	2.44	www.gnu.org/software/glibc	(GPL-2.0-only AND LGPL-2.1-only)
gmp	6.3.0	www.gnu.org/software/gmp	LGPL-3.0-or-later OR GPL-2.0-or-later
grep	3.12	www.gnu.org/software/grep	GPL-3.0-only
gzip	1.14	www.gnu.org/software/gzip	GPL-3.0-only
libcap	2.78	https://storage.googleapis.com/minimal-staging-archives/libcap-2.78.tar.xzMIRROR	BSD-3-Clause OR GPL-2.0-only
libffi	3.7.1	github.com/libffi/libffi	MIT
libidn2	2.3.8	www.gnu.org/software/libidn2	GPL-3.0-or-later AND (GPL-2.0-or-later OR LGPL-3.0-or-later)
libpsl	0.23.0	github.com/rockdaboot/libpsl	MIT
libtool	2.6.2	www.gnu.org/software/libtool	GPL-2.0-only
libunistring	1.4.2	www.gnu.org/software/libunistring	GPL-3.0-only
libuv	1.52.1	github.com/libuv/libuv	MIT
linux_headers	6.12.43	github.com/torvalds/linux	GPL-2.0-only WITH Linux-syscall-note
lz4	1.10.0	github.com/lz4/lz4	BSD-2-Clause AND GPL-2.0-or-later
m4	1.4.21	www.gnu.org/software/m4	GPL-3.0-only
make	4.4.1	www.gnu.org/software/make	GPL-3.0-only
meson	1.11.2	github.com/mesonbuild/meson	Apache-2.0
mpc	1.4.1	www.gnu.org/software/mpc	LGPL-3.0-or-later
mpfr	4.2.2	www.gnu.org/software/mpfr	GPL-3.0-only
ncurses	6.6	www.gnu.org/software/ncurses	X11-distribute-modifications-variant
ninja	1.13.2	github.com/ninja-build/ninja	Apache-2.0
openssl	3.6.3	github.com/openssl/openssl	Apache-2.0
pcre2	10.47	github.com/PCRE2Project/pcre2	BSD-3-Clause WITH PCRE2-exception
perl	5.44.0	github.com/Perl/perl5	Artistic-1.0-Perl OR GPL-1.0-or-later
pkgconf	3.0.4	github.com/pkgconf/pkgconf	ISC
python	3.14.6	github.com/python/cpython	Python-2.0.1
readline	8.3	www.gnu.org/software/readline	GPL-3.0-only
sed	4.10	www.gnu.org/software/sed	GPL-3.0-only
setuptools	83.0.0	github.com/pypa/setuptools	MIT
sqlite	3.53.3	github.com/sqlite/sqlite	blessing
tar	1.35	www.gnu.org/software/tar	GPL-3.0-only
util-linux	2.42.2	github.com/util-linux/util-linux	GPL-2.0-or-later AND LGPL-2.1-or-later AND BSD-3-Clause
xz	5.8.3	github.com/tukaani-project/xz	(0BSD AND GPL-2.0-only AND GPL-3.0-only AND LGPL-2.1-only)
zlib	1.3.2	github.com/madler/zlib	Zlib
zstd	1.5.7	github.com/facebook/zstd	BSD-3-Clause OR GPL-2.0-only

libssh2

Install package

What is "libssh2"?

How to use this package

Quick install

Declare as a task dependency in minimal.toml

Build-time vs runtime

Dependencies (8)

Dependency changes

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56 components