Vulnerability-Lookup

UBUNTU-CVE-2026-48785 (CVE-2026-48785)

Vulnerability from osv_ubuntu – Published: 2026-09-15 18:17 – Updated: 2026-09-23 23:30 – Source website

Details

Apptainer is an open source container platform. Prior to version 1.5.1, Image.AuthorizedPath applies plain string-prefix matching to the limit container paths directive in apptainer.conf, so an allowed path such as /data/safe also authorizes a sibling path such as /data/safe-but-unsafe. A local user can consequently run a container from a directory outside the administrator's intended allowlist when Apptainer operates in setuid mode. Installations that do not use setuid mode or do not configure limit container paths are not affected, and unrestricted user namespaces already allow users to run containers of their choice. This issue is fixed in version 1.5.1.

Severity

4.8 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-48785	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-48785	REPORT
	https://github.com/apptainer/apptainer/security/a…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "apptainer",
            "binary_version": "1.4.0-6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "apptainer",
        "purl": "pkg:deb/ubuntu/apptainer@1.4.0-6?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0-5",
        "1.4.0-6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "apptainer",
            "binary_version": "1.4.5-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "apptainer",
        "purl": "pkg:deb/ubuntu/apptainer@1.4.5-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0-6",
        "1.4.4-1",
        "1.4.4-2",
        "1.4.5-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Apptainer is an open source container platform. Prior to version 1.5.1, Image.AuthorizedPath applies plain string-prefix matching to the limit container paths directive in apptainer.conf, so an allowed path such as /data/safe also authorizes a sibling path such as /data/safe-but-unsafe. A local user can consequently run a container from a directory outside the administrator\u0027s intended allowlist when Apptainer operates in setuid mode. Installations that do not use setuid mode or do not configure limit container paths are not affected, and unrestricted user namespaces already allow users to run containers of their choice. This issue is fixed in version 1.5.1.",
  "id": "UBUNTU-CVE-2026-48785",
  "modified": "2026-09-23T23:30:19Z",
  "published": "2026-09-15T18:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48785"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-48785"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apptainer/apptainer/security/advisories/GHSA-cr2j-534f-mf3g"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-48785"
  ]
}

CVE-2026-48785 (GCVE-0-2026-48785)

Vulnerability from cvelistv5 – Published: 2026-09-15 17:19 – Updated: 2026-09-15 17:38

Title

Apptainer: Incorrect path matching for 'limit container paths' directive

Summary

Severity

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 17:38 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/apptainer/apptainer/security/a…	x_refsource_CONFIRM
https://github.com/apptainer/apptainer/pull/3549	x_refsource_MISC
https://github.com/apptainer/apptainer/commit/0ff…	x_refsource_MISC
https://github.com/apptainer/apptainer/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
apptainer	apptainer	Affected: < 1.5.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48785",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-15T17:38:03.190026Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-15T17:38:10.029Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "apptainer",
          "vendor": "apptainer",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.5.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Apptainer is an open source container platform. Prior to version 1.5.1, Image.AuthorizedPath applies plain string-prefix matching to the limit container paths directive in apptainer.conf, so an allowed path such as /data/safe also authorizes a sibling path such as /data/safe-but-unsafe. A local user can consequently run a container from a directory outside the administrator\u0027s intended allowlist when Apptainer operates in setuid mode. Installations that do not use setuid mode or do not configure limit container paths are not affected, and unrestricted user namespaces already allow users to run containers of their choice. This issue is fixed in version 1.5.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T17:19:24.098Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/apptainer/apptainer/security/advisories/GHSA-cr2j-534f-mf3g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/apptainer/apptainer/security/advisories/GHSA-cr2j-534f-mf3g"
        },
        {
          "name": "https://github.com/apptainer/apptainer/pull/3549",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apptainer/apptainer/pull/3549"
        },
        {
          "name": "https://github.com/apptainer/apptainer/commit/0ff35257420e0c6cb97dac11d305749c893e5214",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apptainer/apptainer/commit/0ff35257420e0c6cb97dac11d305749c893e5214"
        },
        {
          "name": "https://github.com/apptainer/apptainer/releases/tag/v1.5.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apptainer/apptainer/releases/tag/v1.5.1"
        }
      ],
      "source": {
        "advisory": "GHSA-cr2j-534f-mf3g",
        "discovery": "UNKNOWN"
      },
      "title": "Apptainer: Incorrect path matching for \u0027limit container paths\u0027 directive"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48785",
    "datePublished": "2026-09-15T17:19:24.098Z",
    "dateReserved": "2026-05-22T20:18:20.365Z",
    "dateUpdated": "2026-09-15T17:38:10.029Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

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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UBUNTU-CVE-2026-48785 (CVE-2026-48785)

CVE-2026-48785 (GCVE-0-2026-48785)

Tags

Sightings

Nomenclature

Related by attack behaviour