CVE-2026-15370
HIGHCVSS 7.3/10EPSS 0.15%
Last modified
CVE-2026-15370 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libssh | Libssh | >= 0.11.0, < 0.11.5 |
| Libssh | Libssh | 0.12.0 |
| Redhat | Hardened Images | All versions |
| Redhat | Enterprise Linux | 10.0 |
| Redhat | Enterprise Linux | 10.2 |
| Redhat | Enterprise Linux For Els | 10.2 |
| Redhat | Enterprise Linux For Eus | 10.2 |
| Redhat | Enterprise Linux For Ibm Z Systems | 10.0 |
| Redhat | Enterprise Linux For Ibm Z Systems | 10.2 |
| Redhat | Enterprise Linux For Ibm Z Systems Els | 10.2 |
| Redhat | Enterprise Linux For Ibm Z Systems Eus | 10.2 |
| Redhat | Enterprise Linux For Power Little Endian | 10.0 |
| Redhat | Enterprise Linux For Power Little Endian | 10.2 |
| Redhat | Enterprise Linux For Power Little Endian Els | 10.2 |
| Redhat | Enterprise Linux For Power Little Endian Eus | 10.2 |
References
- https://access.redhat.com/errata/RHSA-2026:47768Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:55855Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-15370Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2499049Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-15370?
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.
How severe is CVE-2026-15370?
CVE-2026-15370 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2026-15370?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-15370?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST