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Vulnerabilities

Vulnerability · CVE-2026-15370

A flaw was found in libssh.

Published Jul 21, 2026 · catalog updated Oct 17, 2026 · A flaw was found

Check if you run it

No confirmed exploitation is on record for CVE-2026-15370. EPSS is 0.17%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.17%
Remediation
Advisory link
Affected products
Debian:13 libssh · Debian:14 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:13 libssh0 → 0.11.5-0+deb13u1
  • Debian:14 libssh0 → 0.12.1-1

How to fix CVE-2026-15370

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-15370. EPSS is 0.17%. Act only if a listed version of A flaw was found is installed.

Which versions are affected?

Compare what you have installed with 0 → 0.11.5-0+deb13u1, 0 → 0.12.1-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 21, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    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.

  2. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libssh fixed in 0.11.5-0+deb13u1; libssh fixed in 0.12.1-1

  3. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libssh fixed in 0.11.5-0+deb13u1

  4. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libssh fixed in 0.12.1-1

  5. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-15370

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-15370

    30-day exploitation probability 0.2%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-15370
    osv.dev
  • Trivy Vulnerability DBPackage advisoryDEBIAN-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 buf

    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.