OPENSUSE-SU-2026:21549-1: libssh2_org security update

OPENSUSE-SU-2026:21549-1, released August 10, 2026, fixes 8 CVEs in libssh2_org (version 1.11.1-160000.5.1). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

8.8

Base score, 0 to 10

Highest EPSS

0.0065

51st percentile

Priority of the 8 CVEs

Patch now 0
                                Urgent 0
                                High 6
                                Routine 2

Fixed package versions

Product	Release	Fixed in
libssh2_org	opensuse-leap 16.0	1.11.1-160000.5.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-66033	libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation	7.5	0.0058	None reported
High	CVE-2026-66035	libssh2 Heap Buffer Overflow via ETM Cipher Negotiation	7.5	0.0047	None reported
High	CVE-2026-7598	libssh2 userauth.c userauth_password integer overflow	7.3	0.0047	None reported
High	CVE-2026-66032	libssh2 Double-Free Heap Corruption via sftp_open()	8.8	0.0045	None reported
High	CVE-2026-58050	libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation	7.5	0.0044	None reported
High	CVE-2026-66034	libssh2 Heap Out-of-Bounds Read via publickey subsystem	7.5	0.0040	None reported
Routine	CVE-2025-15661	libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c	6.5	0.0065	None reported
Routine	CVE-2026-58051	libssh2: libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before par...	n/a	0.0028	None reported

Also fixes CVE-2026-66033

SUSE-SU-2026:23225-1
libssh2_org on sles 16.0
SUSE-SU-2026:3541-1
libssh2_org on sles 15.6, sles 15.7
ALAS2023-2026-2064
cargo-c, cargo-c-debuginfo, rust-cargo-c-debugsource on amzn 2023
libssh2-1t64 1.11.0-4.1ubuntu0.24.04.4
libssh2-1t64 on Ubuntu 24.04.5 LTS (noble)
libssh2-1t64 1.11.1-1ubuntu0.26.04.4
libssh2-1t64 on Ubuntu 26.04.1 LTS (resolute)
DEBIAN-CVE-2026-66033
libssh2 on Debian 13.5 (trixie), Debian 14

Vendor advisory

https://osv.dev/vulnerability/openSUSE-SU-2026:21549-1

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