Vulnerability-Lookup

FKIE_CVE-2026-34078

Vulnerability from fkie_nvd - Published: 2026-04-07 22:16 - Updated: 2026-07-24 22:10

Severity

10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

References

URL	Tags
security-advisories@github.com	https://github.com/flatpak/flatpak/security/advisories/GHSA-cc2q-qc34-jprg	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/04/09/8	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/04/10/14	Mailing List, Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:21755
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:21756
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:21757
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:23417
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:23418
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:23419
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:23420
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:25068
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:25381
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:30901
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:35843
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-34078
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2456276
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34078.json

Impacted products

	Vendor	Product	Version
	flatpak	flatpak	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "flatpak",
          "vendor": "flatpak",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.16.4"
            }
          ]
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      ],
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    },
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          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
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          "defaultStatus": "affected",
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          "vendor": "Red Hat",
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          ]
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      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0555624B-B2EE-4FA9-908C-CB7707FABD23",
              "versionEndIncluding": "1.16.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Flatpak es un framework de distribuci\u00f3n y sandboxing de aplicaciones Linux. Antes de la versi\u00f3n 1.16.4, el portal de Flatpak acepta rutas en las opciones de sandbox-expose que pueden ser enlaces simb\u00f3licos controlados por la aplicaci\u00f3n que apuntan a rutas arbitrarias. Flatpak run monta la ruta de host resuelta en el sandbox. Esto da a las aplicaciones acceso a todos los archivos del host y puede usarse como una primitiva para obtener ejecuci\u00f3n de c\u00f3digo en el contexto del host. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 1.16.4."
    }
  ],
  "id": "CVE-2026-34078",
  "lastModified": "2026-07-24T22:10:00.140",
  "metrics": {
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    "cvssMetricV40": [
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          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
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          "attackRequirements": "NONE",
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          "confidentialityRequirement": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
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          "valueDensity": "NOT_DEFINED",
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          "role": "CISA Coordinator",
          "timestamp": "2026-04-08T00:00:00+00:00",
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34078.json"
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-61"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        }
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      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
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  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-04-07 21:27 – Updated: 2026-07-15 01:04

Title

Flatpak has a complete sandbox escape leading to host file access and code execution in the host context

Summary

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 · CISA-ADP (v2.0.3)

Decision recorded 2026-04-08 00:00 UTC

CWE

CWE-61 - UNIX Symbolic Link (Symlink) Following
CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

GitHub_M mitre root

References

17 references

URL	Tags
https://github.com/flatpak/flatpak/security/advis…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2026/04/09/8
http://www.openwall.com/lists/oss-security/2026/0…
https://access.redhat.com/security/cve/CVE-2026-34078	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2456276	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:35843	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23420	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21757	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21756	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30901	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25381	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25068	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23419	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23417	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23418	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21755	vendor-advisoryx_refsource_REDHAT

Impacted products

15 products

Vendor	Product	Version
flatpak	flatpak	Affected: < 1.16.4
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:1.16.0-9.el10_2.1 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
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
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
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:1.12.9-4.el8_10 , < * (rpm) cpe:/a:redhat:enterprise_linux:8
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
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
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
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
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
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
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:1.12.9-4.el9_8.1 , < * (rpm) cpe:/a:redhat:enterprise_linux:9
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
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
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

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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.