Vulnerability-Lookup

RHSA-2026:23418

Vulnerability from csaf_opensuse - Published: 2026-06-04 00:00 - Updated: 2026-09-16 18:29

Summary

security update for flatpak

Severity

Important

Notes

Title of the patch: security update for flatpak

Description of the patch: This security update provides a functional equivalent of RHSA-2026:23418. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2026:23418.

Patchnames: RHSA-2026:23418

CVE-2026-34078

8.2 (High)


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

Affected products

Recommended 9 products

Product	Version	Remediation
Unresolved product id: SUSE Liberty Linux 9:flatpak-1.12.9-4.el9_6.1.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-1.12.9-4.el9_6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-devel-1.12.9-4.el9_6.1.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-devel-1.12.9-4.el9_6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-libs-1.12.9-4.el9_6.1.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-libs-1.12.9-4.el9_6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-selinux-1.12.9-4.el9_6.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-session-helper-1.12.9-4.el9_6.1.i686	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:flatpak-session-helper-1.12.9-4.el9_6.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-34079

6.7 (Medium)


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

Affected products

Recommended 9 products, the same list as for CVE-2026-34078

Threats

Impact moderate

References

10 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/r…	self
https://lists.suse.com/pipermail/suse-liberty-lin…	self
https://lists.suse.com/pipermail/suse-liberty-lin…	self
https://www.suse.com/security/cve/CVE-2026-34078/	self
https://www.suse.com/security/cve/CVE-2026-34079/	self
https://www.suse.com/security/cve/CVE-2026-34078	external
https://bugzilla.suse.com/1261769	external
https://www.suse.com/security/cve/CVE-2026-34079	external
https://bugzilla.suse.com/1261770	external

JSON

To clipboard

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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

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 · 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

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          },
          {
            "lang": "en",
            "value": "RHSA-2026:30901: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:25381: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:25068: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:23419: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:23417: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:23418: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:21755: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          }
        ],
        "timeline": [
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            "lang": "en",
            "time": "2026-04-07T22:01:09.203Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-04-07T21:27:45.643Z",
            "value": "Made public."
          }
        ],
        "title": "flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options",
        "workarounds": [
          {
            "lang": "en",
            "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
          }
        ],
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          "vendor": "flatpak",
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            {
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              "version": "\u003c 1.16.4"
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        }
      ],
      "descriptions": [
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
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          "descriptions": [
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              "cweId": "CWE-61",
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        "advisory": "GHSA-cc2q-qc34-jprg",
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CVE-2026-34079 (GCVE-0-2026-34079)

Vulnerability from cvelistv5 – Published: 2026-04-07 21:29 – Updated: 2026-04-10 20:13

Title

Flatpak affected by arbitrary file deletion on the host filesystem

Summary

Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory. This allows Flatpak apps to delete arbitrary files on the host. This vulnerability is fixed in 1.16.4.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-10 20:13 UTC

CWE

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

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/flatpak/flatpak/security/advis…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
flatpak	flatpak	Affected: < 1.16.4

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.

Action not permitted

RHSA-2026:23418

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

CVE-2026-34079 (GCVE-0-2026-34079)

Tags

Sightings

Nomenclature

Related by attack behaviour