Vulnerability-Lookup

UBUNTU-CVE-2026-108546 (CVE-2026-108546)

Vulnerability from osv_ubuntu – Published: 2026-10-10 15:16 – Updated: 2026-10-17 10:01 – Source website

Details

Spotweb through 1.5.8 contains an OS command injection vulnerability in the runcommand NZB handler that allows remote attackers to execute commands by publishing spots with malicious titles. Attackers can post self-signed spots over Usenet with shell metacharacters in the title, which are substituted unescaped for $SPOTTITLE and passed to exec() when a user downloads the spot, running commands as the Spotweb PHP process.

Severity

7.5 (High)


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

7.7 (High)


                    
                      CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-108546	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-108546	REPORT
	https://github.com/spotweb/spotweb	REPORT
	https://github.com/spotweb/spotweb/blob/1.5.8/lib…	REPORT
	https://hackmd.io/@haind/spotweb-runcommand-title…	REPORT
	https://www.vulncheck.com/advisories/spotweb-thro…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "spotweb",
            "binary_version": "20130826+dfsg3-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "spotweb",
        "purl": "pkg:deb/ubuntu/spotweb@20130826+dfsg3-4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20130826+dfsg3-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "spotweb",
            "binary_version": "20130826+dfsg3-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "spotweb",
        "purl": "pkg:deb/ubuntu/spotweb@20130826+dfsg3-4?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20130826+dfsg3-4"
      ]
    }
  ],
  "aliases": [],
  "details": "Spotweb through 1.5.8 contains an OS command injection vulnerability in the runcommand NZB handler that allows remote attackers to execute commands by publishing spots with malicious titles. Attackers can post self-signed spots over Usenet with shell metacharacters in the title, which are substituted unescaped for $SPOTTITLE and passed to exec() when a user downloads the spot, running commands as the Spotweb PHP process.",
  "id": "UBUNTU-CVE-2026-108546",
  "modified": "2026-10-17T10:01:22Z",
  "published": "2026-10-10T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-108546"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-108546"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/spotweb/spotweb"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/spotweb/spotweb/blob/1.5.8/lib/services/NzbHandler/Services_NzbHandler_Runcommand.php#L41-L45"
    },
    {
      "type": "REPORT",
      "url": "https://hackmd.io/@haind/spotweb-runcommand-title-injection"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/spotweb-through-1.5.8-os-command-injection-via-spot-title-in-runcommand-integration"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-108546"
  ]
}

CVE-2026-108546 (GCVE-0-2026-108546)

Vulnerability from cvelistv5 – Published: 2026-10-10 14:15 – Updated: 2026-10-13 18:28

Title

Spotweb through 1.5.8 OS Command Injection via Spot Title in Runcommand Integration

Summary

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.5 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-13 18:28 UTC

CWE

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

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 7427 records in the last 180 days details

References

4 references

URL	Tags
https://hackmd.io/@haind/spotweb-runcommand-title…	technical-descriptionexploit
https://github.com/spotweb/spotweb	product
https://github.com/spotweb/spotweb/blob/1.5.8/lib…	technical-description
https://www.vulncheck.com/advisories/spotweb-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spotweb	spotweb	Affected: 0 , ≤ 1.5.8 (semver) cpe:2.3:a:spotweb_project:spotweb::::::::

Date Public

2026-10-09 00:00

Credits

HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "metrics": [
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                "id": "CVE-2026-108546",
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                  },
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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.

Vulnerability timeline

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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.
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