CVE-2026-34078 (GCVE-0-2026-34078)

Vulnerability from cvelistv5 – Published: 2026-04-07 21:27 – Updated: 2026-07-15 01:04
VLAI
Title
Flatpak has a complete sandbox escape leading to host file access and code execution in the host context
Summary
Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox. This gives apps access to all host files and can be used as a primitive to gain code execution in the host context. This vulnerability is fixed in 1.16.4.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
Impacted products
Vendor Product Version
flatpak flatpak Affected: < 1.16.4
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:1.16.0-9.el10_2.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:1.16.0-5.el10_0.2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:1.12.9-3.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.12.9-4.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:1.12.9-2.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:1.12.9-2.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.4
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:1.12.9-1.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:1.12.9-1.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.6
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:1.12.9-1.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:1.12.9-1.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.12.9-4.el9_8.1 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:1.12.7-5.el9_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:1.12.9-3.el9_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:1.12.9-4.el9_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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      "dataType": "CVE_RECORD",
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    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.