WID-SEC-W-2026-1332
Vulnerability from csaf_certbund - Published: 2026-05-03 22:00 - Updated: 2026-08-31 22:00Summary
libssh2: Schwachstelle ermöglicht Denial of Service
Severity
Mittel
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: libssh2 ist eine C Bibliothek für das Anbieten von SSH2 Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuführen, Dateien zu übertragen oder als sicherer und transparenter Tunnel für entfernte Programme genutzt werden.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh2 ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux
- UNIX
Affected products
Known affected
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Open Source nmap <7.991
Open Source / nmap
|
<7.991 | ||
|
Gentoo Linux
Gentoo
|
cpe:/o:gentoo:linux:-
|
— | |
|
Fedora Linux
Fedora
|
cpe:/o:fedoraproject:fedora:-
|
— | |
|
NetApp ActiveIQ Unified Manager for VMware vSphere
NetApp / ActiveIQ Unified Manager
|
cpe:/a:netapp:active_iq_unified_manager:for_vmware_vsphere
|
for VMware vSphere | |
|
Dell Secure Connect Gateway <5.36.00.16
Dell / Secure Connect Gateway
|
<5.36.00.16 | ||
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
Open Source libssh2
Open Source
|
cpe:/a:libssh2:libssh2:-
|
— | |
|
Debian Linux
Debian
|
cpe:/o:debian:debian_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— | |
|
Microsoft Azure Linux azl3
Microsoft / Azure Linux
|
cpe:/o:microsoft:azure_linux:azl3
|
azl3 |
References
29 references
{
"document": {
"aggregate_severity": {
"text": "mittel"
},
"category": "csaf_base",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "de-DE",
"notes": [
{
"category": "legal_disclaimer",
"text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
},
{
"category": "description",
"text": "libssh2 ist eine C Bibliothek f\u00fcr das Anbieten von SSH2 Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuf\u00fchren, Dateien zu \u00fcbertragen oder als sicherer und transparenter Tunnel f\u00fcr entfernte Programme genutzt werden.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh2 ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Linux\n- UNIX",
"title": "Betroffene Betriebssysteme"
}
],
"publisher": {
"category": "other",
"contact_details": "csaf-provider@cert-bund.de",
"name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
"namespace": "https://www.bsi.bund.de"
},
"references": [
{
"category": "self",
"summary": "WID-SEC-W-2026-1332 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1332.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-1332 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1332"
},
{
"category": "external",
"summary": "EU Vulnerability Database vom 2026-05-03",
"url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-26722"
},
{
"category": "external",
"summary": "libssh commit vom 2026-05-03",
"url": "https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1"
},
{
"category": "external",
"summary": "Vuldb mit PoC vom 2026-04-15",
"url": "https://vuldb.com/submit/805564"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:7021 vom 2026-05-11",
"url": "https://access.redhat.com/errata/RHSA-2026:7021"
},
{
"category": "external",
"summary": "Microsoft Security Update Guide vom 2026-05-12",
"url": "https://msrc.microsoft.com/update-guide/"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-2026-F87AC8187C vom 2026-05-22",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-f87ac8187c"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-2026-1B9134CDC9 vom 2026-05-22",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-1b9134cdc9"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-EPEL-2026-E7B8776A02 vom 2026-05-22",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-e7b8776a02"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-EPEL-2026-AFD26AD447 vom 2026-05-22",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-afd26ad447"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-EPEL-2026-AFCB3443A1 vom 2026-05-22",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-afcb3443a1"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-8309-1 vom 2026-05-26",
"url": "https://ubuntu.com/security/notices/USN-8309-1"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3329 vom 2026-06-09",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3329.html"
},
{
"category": "external",
"summary": "Debian Security Advisory DSA-6365 vom 2026-06-25",
"url": "https://security-tracker.debian.org/tracker/DSA-6365-1"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:11109-1 vom 2026-06-26",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/SRBHQ76PA4ZHTWY5F4ESYPYF3G2NLGWI/"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3525-1 vom 2026-08-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028175.html"
},
{
"category": "external",
"summary": "Nmap Changelog vom 2026-08-08",
"url": "https://nmap.org/changelog.html#7.991"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3526-1 vom 2026-08-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028174.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3541-1 vom 2026-08-11",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028188.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23049-1 vom 2026-08-12",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028256.html"
},
{
"category": "external",
"summary": "NetApp Security Advisory NTAP-20260814-0020 vom 2026-08-14",
"url": "https://security.netapp.com/advisory/NTAP-20260814-0020"
},
{
"category": "external",
"summary": "Gentoo Linux Security Advisory GLSA-202608-17 vom 2026-08-20",
"url": "https://security.gentoo.org/glsa/202608-17"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23187-1 vom 2026-08-24",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028468.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23245-1 vom 2026-08-27",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028562.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23214-1 vom 2026-08-27",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028550.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23225-1 vom 2026-08-26",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028529.html"
},
{
"category": "external",
"summary": "Dell Security Advisory DSA-2026-386 vom 2026-09-01",
"url": "https://www.dell.com/support/kbdoc/000503504/dsa-2026-386-security-update-f"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:61752 vom 2026-08-31",
"url": "https://access.redhat.com/errata/RHSA-2026:61752"
}
],
"source_lang": "en-US",
"title": "libssh2: Schwachstelle erm\u00f6glicht Denial of Service",
"tracking": {
"current_release_date": "2026-08-31T22:00:00.000+00:00",
"generator": {
"date": "2026-09-01T10:59:04.522+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-1332",
"initial_release_date": "2026-05-03T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-05-03T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-05-10T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-05-11T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates aufgenommen"
},
{
"date": "2026-05-25T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von Fedora aufgenommen"
},
{
"date": "2026-05-26T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von Ubuntu aufgenommen"
},
{
"date": "2026-06-08T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von Amazon aufgenommen"
},
{
"date": "2026-06-25T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von Debian aufgenommen"
},
{
"date": "2026-06-28T22:00:00.000+00:00",
"number": "8",
"summary": "Neue Updates von openSUSE aufgenommen"
},
{
"date": "2026-08-09T22:00:00.000+00:00",
"number": "9",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-10T22:00:00.000+00:00",
"number": "10",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-11T22:00:00.000+00:00",
"number": "11",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-16T22:00:00.000+00:00",
"number": "12",
"summary": "Neue Updates von NetApp aufgenommen"
},
{
"date": "2026-08-19T22:00:00.000+00:00",
"number": "13",
"summary": "Neue Updates von Gentoo aufgenommen"
},
{
"date": "2026-08-24T22:00:00.000+00:00",
"number": "14",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-26T22:00:00.000+00:00",
"number": "15",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-31T22:00:00.000+00:00",
"number": "16",
"summary": "Neue Updates von Dell und Red Hat aufgenommen"
}
],
"status": "final",
"version": "16"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Amazon Linux 2",
"product": {
"name": "Amazon Linux 2",
"product_id": "398363",
"product_identification_helper": {
"cpe": "cpe:/o:amazon:linux_2:-"
}
}
}
],
"category": "vendor",
"name": "Amazon"
},
{
"branches": [
{
"category": "product_name",
"name": "Debian Linux",
"product": {
"name": "Debian Linux",
"product_id": "2951",
"product_identification_helper": {
"cpe": "cpe:/o:debian:debian_linux:-"
}
}
}
],
"category": "vendor",
"name": "Debian"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c5.36.00.16",
"product": {
"name": "Dell Secure Connect Gateway \u003c5.36.00.16",
"product_id": "T058878"
}
},
{
"category": "product_version",
"name": "5.36.00.16",
"product": {
"name": "Dell Secure Connect Gateway 5.36.00.16",
"product_id": "T058878-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:dell:secure_connect_gateway:5.36.00.16"
}
}
}
],
"category": "product_name",
"name": "Secure Connect Gateway"
}
],
"category": "vendor",
"name": "Dell"
},
{
"branches": [
{
"category": "product_name",
"name": "Fedora Linux",
"product": {
"name": "Fedora Linux",
"product_id": "T054551",
"product_identification_helper": {
"cpe": "cpe:/o:fedoraproject:fedora:-"
}
}
}
],
"category": "vendor",
"name": "Fedora"
},
{
"branches": [
{
"category": "product_name",
"name": "Gentoo Linux",
"product": {
"name": "Gentoo Linux",
"product_id": "T033788",
"product_identification_helper": {
"cpe": "cpe:/o:gentoo:linux:-"
}
}
}
],
"category": "vendor",
"name": "Gentoo"
},
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "azl3",
"product": {
"name": "Microsoft Azure Linux azl3",
"product_id": "T049210",
"product_identification_helper": {
"cpe": "cpe:/o:microsoft:azure_linux:azl3"
}
}
}
],
"category": "product_name",
"name": "Azure Linux"
}
],
"category": "vendor",
"name": "Microsoft"
},
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "for VMware vSphere",
"product": {
"name": "NetApp ActiveIQ Unified Manager for VMware vSphere",
"product_id": "T025152",
"product_identification_helper": {
"cpe": "cpe:/a:netapp:active_iq_unified_manager:for_vmware_vsphere"
}
}
}
],
"category": "product_name",
"name": "ActiveIQ Unified Manager"
}
],
"category": "vendor",
"name": "NetApp"
},
{
"branches": [
{
"category": "product_name",
"name": "Open Source libssh2",
"product": {
"name": "Open Source libssh2",
"product_id": "T053478",
"product_identification_helper": {
"cpe": "cpe:/a:libssh2:libssh2:-"
}
}
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c7.991",
"product": {
"name": "Open Source nmap \u003c7.991",
"product_id": "T057743"
}
},
{
"category": "product_version",
"name": "7.991",
"product": {
"name": "Open Source nmap 7.991",
"product_id": "T057743-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:nmap:nmap:7.991"
}
}
}
],
"category": "product_name",
"name": "nmap"
}
],
"category": "vendor",
"name": "Open Source"
},
{
"branches": [
{
"category": "product_name",
"name": "Red Hat Enterprise Linux",
"product": {
"name": "Red Hat Enterprise Linux",
"product_id": "67646",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:-"
}
}
}
],
"category": "vendor",
"name": "Red Hat"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE Linux",
"product": {
"name": "SUSE Linux",
"product_id": "T054646",
"product_identification_helper": {
"cpe": "cpe:/o:suse:suse_linux:-"
}
}
},
{
"category": "product_name",
"name": "SUSE openSUSE",
"product": {
"name": "SUSE openSUSE",
"product_id": "T027843",
"product_identification_helper": {
"cpe": "cpe:/o:suse:opensuse:-"
}
}
}
],
"category": "vendor",
"name": "SUSE"
},
{
"branches": [
{
"category": "product_name",
"name": "Ubuntu Linux",
"product": {
"name": "Ubuntu Linux",
"product_id": "T000126",
"product_identification_helper": {
"cpe": "cpe:/o:canonical:ubuntu_linux:-"
}
}
}
],
"category": "vendor",
"name": "Ubuntu"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-7598",
"product_status": {
"known_affected": [
"T057743",
"T033788",
"T054551",
"T025152",
"T058878",
"67646",
"T054646",
"T053478",
"2951",
"T000126",
"T027843",
"398363",
"T049210"
]
},
"release_date": "2026-05-03T22:00:00.000+00:00",
"title": "CVE-2026-7598"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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