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Vulnerability record · CVE-2026-15370 · published 21 July 2026

CVE-2026-15370: Libssh stack-based buffer overflow vulnerability

Libssh · Libssh

A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.

7.3 CVSS 3.1 High EPSS 0.17% · top 94.6% CWE-121 · Stack-based buffer overflow
7.3CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
4References
22 Sep 2026Last modified by NVD

Description

A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.

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

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:47768 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:55855 Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-15370 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2499049 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-15370), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.