CVE-2026-59850: Use-After-Free (CVSS 4.3)

Description

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-416 Use After Free

References

Other References

https://access.redhat.com/security/cve/CVE-2026-59850 https://bugzilla.redhat.com/show_bug.cgi?id=2498183

Frequently Asked Questions

What is CVE-2026-59850? +

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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-59850? +

CVE-2026-59850 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2026-59850? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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