alsa-2026:21755
Vulnerability from osv_almalinux
Published
2026-05-28 00:00
Modified
2026-05-29 12:28
Summary
Important: flatpak security update
Details

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.

Security Fix(es):

  • flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options (CVE-2026-34078)
  • flatpak: Flatpak: Arbitrary file deletion on host via improper cache file path validation (CVE-2026-34079)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "flatpak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12.9-4.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "flatpak-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12.9-4.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "flatpak-libs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12.9-4.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "flatpak-selinux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12.9-4.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "flatpak-session-helper"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.12.9-4.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.  \n\nSecurity Fix(es):  \n\n  * flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options (CVE-2026-34078)\n  * flatpak: Flatpak: Arbitrary file deletion on host via improper cache file path validation (CVE-2026-34079)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:21755",
  "modified": "2026-05-29T12:28:14Z",
  "published": "2026-05-28T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:21755"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-34078"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-34079"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2456276"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2456284"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-21755.html"
    }
  ],
  "related": [
    "CVE-2026-34078",
    "CVE-2026-34079"
  ],
  "summary": "Important: flatpak security update"
}


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Sightings

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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.