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    4 vulnerabilities found for flatpak-builder by flatpak

    CVE-2026-39977 (GCVE-0-2026-39977)

    Vulnerability from nvd – Published: 2026-04-09 19:05 – Updated: 2026-04-09 20:19
    VLAI
    Title
    flatpak-builder has a path traversal leading to arbitrary file read on host when installing licence files
    Summary
    flatpak-builder is a tool to build flatpaks from source. From 1.4.5 to before 1.4.8, the license-files manifest key takes an array of paths to user defined licence files relative to the source directory of the module. The paths from that array are resolved using g_file_resolve_relative_path() and validated to stay inside the source directory using two checks - g_file_get_relative_path() which does not resolve symlinks and g_file_query_file_type() with G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS which only applies to the final path component. The copy operation runs on host. This can be exploited by using a crafted manifest and/or source to read arbitrary files from the host and capture them into the build output. This vulnerability is fixed in 1.4.8.
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    References
    Impacted products
    Vendor Product Version
    flatpak flatpak-builder Affected: >= 1.4.5, < 1.4.8
    Create a notification for this product.
    Show details on NVD website

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    CVE-2022-21682 (GCVE-0-2022-21682)

    Vulnerability from nvd – Published: 2022-01-13 00:00 – Updated: 2024-08-03 02:46
    VLAI
    Title
    flatpak-builder can access files outside the build directory.
    Summary
    Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`.
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    Impacted products
    Vendor Product Version
    flatpak flatpak Affected: >= 1.11.0, < 1.12.3
    Affected: < 1.10.6
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-39977 (GCVE-0-2026-39977)

    Vulnerability from cvelistv5 – Published: 2026-04-09 19:05 – Updated: 2026-04-09 20:19
    VLAI
    Title
    flatpak-builder has a path traversal leading to arbitrary file read on host when installing licence files
    Summary
    flatpak-builder is a tool to build flatpaks from source. From 1.4.5 to before 1.4.8, the license-files manifest key takes an array of paths to user defined licence files relative to the source directory of the module. The paths from that array are resolved using g_file_resolve_relative_path() and validated to stay inside the source directory using two checks - g_file_get_relative_path() which does not resolve symlinks and g_file_query_file_type() with G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS which only applies to the final path component. The copy operation runs on host. This can be exploited by using a crafted manifest and/or source to read arbitrary files from the host and capture them into the build output. This vulnerability is fixed in 1.4.8.
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    References
    Impacted products
    Vendor Product Version
    flatpak flatpak-builder Affected: >= 1.4.5, < 1.4.8
    Create a notification for this product.
    Show details on NVD website

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    CVE-2022-21682 (GCVE-0-2022-21682)

    Vulnerability from cvelistv5 – Published: 2022-01-13 00:00 – Updated: 2024-08-03 02:46
    VLAI
    Title
    flatpak-builder can access files outside the build directory.
    Summary
    Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`.
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    Impacted products
    Vendor Product Version
    flatpak flatpak Affected: >= 1.11.0, < 1.12.3
    Affected: < 1.10.6
    Create a notification for this product.
    Show details on NVD website

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            {
              "lang": "en",
              "value": "Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.7,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
                "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": "2023-12-23T10:06:21.099Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-8ch7-5j3h-g4fx"
            },
            {
              "url": "https://github.com/flatpak/flatpak/commit/445bddeee657fdc8d2a0a1f0de12975400d4fc1a"
            },
            {
              "url": "https://github.com/flatpak/flatpak/commit/4d11f77aa7fd3e64cfa80af89d92567ab9e8e6fa"
            },
            {
              "name": "FEDORA-2022-825ca6bf2b",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APFTBYGJJVJPFVHRXUW5PII5XOAFI4KH/"
            },
            {
              "name": "DSA-5049",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://www.debian.org/security/2022/dsa-5049"
            },
            {
              "name": "FEDORA-2022-7e328bd66c",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IXKBERLJRYV7KXKGXOLI6IOXVBQNN4DP/"
            },
            {
              "name": "GLSA-202312-12",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202312-12"
            }
          ],
          "source": {
            "advisory": "GHSA-8ch7-5j3h-g4fx",
            "discovery": "UNKNOWN"
          },
          "title": "flatpak-builder can access files outside the build directory."
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2022-21682",
        "datePublished": "2022-01-13T00:00:00.000Z",
        "dateReserved": "2021-11-16T00:00:00.000Z",
        "dateUpdated": "2024-08-03T02:46:39.409Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }