High severity · published Jul 21, 2026
CVE-2026-15370
Libssh: libssh: stack buffer overflow in sftp server longname construction
7.3
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
EL
Enterprise Linux · Redhat
10.0; 10.0; 10.0; 10.2; 10.2 · source: NVD
EL
Enterprise Linux For Els · Redhat
10.2; 10.2 · source: NVD
EL
Enterprise Linux For Eus · Redhat
10.2; 10.2 · source: NVD
EL
Enterprise Linux For Ibm Z Systems · Redhat
10.0; 10.2 · source: NVD
EL
Enterprise Linux For Ibm Z Systems Els · Redhat
10.2 · source: NVD
EL
Enterprise Linux For Ibm Z Systems Eus · Redhat
10.2 · source: NVD
EL
Enterprise Linux For Power Little Endian · Redhat
10.0; 10.2 · source: NVD
EL
Enterprise Linux For Power Little Endian Els · Redhat
10.2 · source: NVD
EL
Enterprise Linux For Power Little Endian Eus · Redhat
10.2 · source: NVD
HI
Hardened Images · Redhat
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15370
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15370
Vendor Advisory
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
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2499049
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