Highest advisory severityMedium 2 vendors · 2 advisories

CVE-2026-59850

Libssh Vulnerability in NetApp Products

CVE-2026-59850: Libssh Vulnerability in NetApp Products. Not in the CISA KEV catalog. Medium advisory severity (CVSS 4.3, NetApp).

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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CVE-2026-59850 key facts

CISA KEV: Not listed (catalog checked Nov 6, 2026)
Highest advisory severity: Medium
CVSS base score: 4.3 (NetApp), 4.3 (Red Hat)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L (Red Hat)
Weakness: CWE-416
Fixed releases: Red Hat: libssh-0:0.12.0-3.el10_2, libssh-0:0.9.6-17.el8_10, libssh-0:0.10.4-19.el9_8, libssh-main-0.12.1-4.hum1, RHSA-2026:55855, RHSA-2026:62218 and 2 more in the advisory
Vendor advisories: 2 from NetApp, Red Hat
VulniPulse record: Published Jul 21, 2026 · Updated Aug 11, 2026

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-59850; bulletin-wide values are not repeated here.

Is CVE-2026-59850 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-59850 is not in the CISA KEV catalog (checked Nov 6, 2026) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-59850?

Upgrade to a fixed release named by the vendor:

Red Hat: libssh-0:0.12.0-3.el10_2, libssh-0:0.9.6-17.el8_10, libssh-0:0.10.4-19.el9_8, libssh-main-0.12.1-4.hum1, RHSA-2026:55855, RHSA-2026:62218

Manually verify the channel is not closed inside your channel data callbacks. (Red Hat)

Vendor advisory comparison

NetApp

1 advisory

Advisory severityMedium4.3
Medium [CVE-2026-59850] Libssh Vulnerability in NetApp Products
NTAP-20260807-0011Source published Aug 7, 2026Source updated Aug 7, 2026
Libssh versions prior to 0.11.5 and prior to 0.12.1 are susceptible to a vulnerability which when successfully exploited could lead to Denial of Service (DoS). Successful exploitation of this vulnerability could lead to Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
Affected products in this advisory
No product details extracted. Check the source bulletin.
Source-reported affected versions
0.11.5
0.12.1
Source-reported fixed versions
No fixed-version detail extracted. This does not mean no fix exists.
Mitigation guidance
No mitigation guidance extracted; consult the source.
Full advisory and evidence Open source bulletin

Red Hat

1 advisory

Advisory severityMedium4.3
Medium [CVE-2026-59850] use-after-free via data callbacks on closed channels
CVE-2026-59850Source published Jul 21, 2026Source updated Jul 21, 2026
A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leading to crashes or possible use-after-free conditions. Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-416. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images. Red Hat fixing advisory: RHSA-2026:55855, RHSA-2026:62218, RHSA-2026:62217, RHSA-2026:42922. Affected products named by the advisory: Red Hat package: libssh.
Affected products in this advisory
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Hardened Images
1 more entries in the full advisory.
Source-reported affected versions
Affected-version details not available in this record.
Source-reported fixed versions
libssh-0:0.12.0-3.el10_2
libssh-0:0.9.6-17.el8_10
libssh-0:0.10.4-19.el9_8
libssh-main-0.12.1-4.hum1
4 more entries in the full advisory.
Mitigation guidance
Manually verify the channel is not closed inside your channel data callbacks.
Full advisory and evidence Open source bulletin

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