Vulnerability-Lookup

WID-SEC-W-2026-3020

Vulnerability from csaf_certbund - Published: 2026-08-25 22:00 - Updated: 2026-08-30 22:00

Summary

GNU Emacs TRAMP: Schwachstelle ermöglicht Codeausführung

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: GNU Emacs ist Texteditor, welcher durch eine Programmierschnittstelle in der Programmiersprache Emacs Lisp mit beliebigen Erweiterungen ausgestattet werden kann.

Angriff: Ein lokaler Angreifer kann eine Schwachstelle in GNU Emacs TRAMP ausnutzen, um beliebigen Programmcode auszuführen.

Betroffene Betriebssysteme: - Sonstiges - UNIX - Windows

CVE-2026-79992

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Open Source GNU Emacs TRAMP Open Source / GNU Emacs	`cpe:/a:gnu:emacs:tramp`	TRAMP
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

References

7 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://github.com/advisories/GHSA-42VV-CFP2-9QC8	external
https://access.redhat.com/security/cve/CVE-2026-79992	external
https://bugzilla.redhat.com/show_bug.cgi?id=2523665	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external

JSON

To clipboard

{
  "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": "GNU Emacs ist Texteditor, welcher durch eine Programmierschnittstelle in der Programmiersprache Emacs Lisp mit beliebigen Erweiterungen ausgestattet werden kann.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann eine Schwachstelle in GNU Emacs TRAMP ausnutzen, um beliebigen Programmcode auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\n- UNIX\n- Windows",
        "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-2026-3020 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3020.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-3020 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3020"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-42VV-CFP2-9QC8 vom 2026-08-25",
        "url": "https://github.com/advisories/GHSA-42VV-CFP2-9QC8"
      },
      {
        "category": "external",
        "summary": "Red Hat Customer Portal CVE-2026-79992 vom 2026-08-25",
        "url": "https://access.redhat.com/security/cve/CVE-2026-79992"
      },
      {
        "category": "external",
        "summary": "Red Hat Bugtracker 2523665 vom 2026-08-25",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2523665"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-6B1A89DFE6 vom 2026-08-28",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b1a89dfe6"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-E47F5A0B84 vom 2026-08-28",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-e47f5a0b84"
      }
    ],
    "source_lang": "en-US",
    "title": "GNU Emacs TRAMP: Schwachstelle erm\u00f6glicht Codeausf\u00fchrung",
    "tracking": {
      "current_release_date": "2026-08-30T22:00:00.000+00:00",
      "generator": {
        "date": "2026-08-31T06:12:07.407+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-3020",
      "initial_release_date": "2026-08-25T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-08-25T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-08-30T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Fedora aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74178",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "TRAMP",
                "product": {
                  "name": "Open Source GNU Emacs TRAMP",
                  "product_id": "T058659",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:gnu:emacs:tramp"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "GNU Emacs"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
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      "cve": "CVE-2026-79992",
      "product_status": {
        "known_affected": [
          "T058659",
          "74178"
        ]
      },
      "release_date": "2026-08-25T22:00:00.000+00:00",
      "title": "CVE-2026-79992"
    }
  ]
}

CVE-2026-79992 (GCVE-0-2026-79992)

Vulnerability from cvelistv5 – Published: 2026-08-25 17:16 – Updated: 2026-08-26 17:56

Title

Emacs: local shell command injection through the user field in emacs tramp

Summary

A flaw was found in Emacs TRAMP. A local attacker could exploit this vulnerability by processing maliciously crafted filenames. This occurs because TRAMP concatenates login arguments without proper sanitization, which are then passed to a local shell. Successful exploitation could lead to arbitrary code execution.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 17:32 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

redhat redhat root

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-79992	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2523665	issue-trackingx_refsource_REDHAT
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-08-21 00:00

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
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        "metrics": [
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                "id": "CVE-2026-79992",
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T17:32:22.093371Z",
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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.

Detection rules are retrieved from Rulezet.

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.

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WID-SEC-W-2026-3020

CVE-2026-79992 (GCVE-0-2026-79992)

Tags

Sightings

Nomenclature