DEBIAN-CVE-2026-55200

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Source

https://security-tracker.debian.org/tracker/CVE-2026-55200

Import Source

https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55200.json

JSON Data

https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-55200

Upstream

CVE-2026-55200

Published

2026-06-17T20:17:28Z

Modified

2026-08-27T23:06:13Z

Severity

8.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L CVSS Calculator

Summary

[none]

Details

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.

References

https://security-tracker.debian.org/tracker/CVE-2026-55200

Affected packages

Debian:13 / libssh2

Package

Name: libssh2
Purl: pkg:deb/debian/libssh2?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.11.1-1+deb13u1

Affected versions

1.*

1.11.1-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55200.json"

Debian:14 / libssh2