{"id":"CVE-2026-92162","summary":"Flatpak vulnerable to path traversal via unvalidated \"arch\" parameter in DeployAppstream","details":"Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Prior to version 1.18.1, on systems where at least one OCI remote is configured (most common on Fedora systems), a malicious local user in an active local session could use a crafted architecture name to trick the `flatpak-system-helper` process into creating a root-owned directory tree with contents determined by the OCI remote, plus a root-owned `lock` file and `icons` directory, outside the intended root directory. If this vulnerability is combined with other vulnerabilities also fixed in 1.18.1, the combination can lead to local root privilege escalation. This particular vulnerability is not believed to be exploitable if there are no OCI remotes configured (common on non-Fedora systems). Version 1.18.1 patches the issue.","aliases":["GHSA-v2gw-v9h5-9q4x"],"modified":"2026-10-21T10:50:19.764996841Z","published":"2026-10-20T14:39:50.538Z","related":["SUSE-SU-2026:4610-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92162.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-22"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92162.json"},{"type":"FIX","url":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279"},{"type":"FIX","url":"https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92"},{"type":"FIX","url":"https://github.com/flatpak/flatpak/commit/aeb369a2723506fabc1f701ef7a0dc6c97c4b983"},{"type":"FIX","url":"https://github.com/flatpak/flatpak/pull/6768"},{"type":"ADVISORY","url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-v2gw-v9h5-9q4x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92162"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/flatpak/flatpak","events":[{"introduced":"0"},{"fixed":"abc06c8bf434171e931426e76a9eb0bfe17cfabd"},{"fixed":"01773f84021dd090b2426f79675f94f2564f9279"},{"fixed":"19456b916842b079af833a86b9ab89c5db154b92"},{"fixed":"aeb369a2723506fabc1f701ef7a0dc6c97c4b983"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"1.18.1"}]},{"range":[{"fixed":"01773f84021dd090b2426f79675f94f2564f9279"}],"source":"REFERENCES_COMMIT"},{"range":[{"fixed":"19456b916842b079af833a86b9ab89c5db154b92"}],"source":"REFERENCES_COMMIT"},{"range":[{"fixed":"aeb369a2723506fabc1f701ef7a0dc6c97c4b983"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["1.18.0","1.17.7","1.17.6","1.17.5","1.17.4","1.17.3","1.17.2","1.17.1","1.17.0","1.16.1","1.16.0","1.15.91","1.15.12","1.15.11","1.15.10","1.15.9","1.15.8","1.15.7","1.15.6","1.15.4","1.15.3","1.15.2","1.15.1","1.15.0","1.14.0","1.13.3","1.13.2","1.13.1","1.11.2","1.12.0","1.11.3","1.11.1","1.10.1","1.10.0","1.9.3","1.9.2","1.9.1","1.8.0","1.7.3","1.7.2","1.7.1","1.6.2","1.6.1","1.6.0","1.5.2","1.5.1","1.5.0","1.4.0","1.3.4","1.3.3","1.3.2","1.3.1","1.3.0","1.2.1","1.2.0","1.1.3","1.1.2","1.1.1","1.1.0","1.0.3","1.0.2","1.0.1","1.0.0","0.99.3","0.99.2","0.99.1","0.11.8.3","0.11.8.2","0.11.8.1","0.11.8","0.11.7","0.11.6","0.11.5","0.11.4","0.11.3","0.11.2","0.11.1","0.10.2","0.10.1","0.10.0","0.9.99","0.9.98.2","0.9.98.1","0.9.98","0.9.12","0.9.11","0.9.10","0.9.9","0.9.8","0.9.7","0.9.6","0.9.5","0.9.4","0.9.3","0.9.2","0.9.1","0.8.1","0.8.0","0.6.14","0.6.13","0.6.12","0.6.11","0.6.10","0.6.9","0.6.8","0.6.7","0.6.6","0.6.5","0.6.4","0.6.3","0.6.2","0.6.1","0.6.0","0.5.2","0.5.1","0.5.0","0.4.13","0.4.12","0.4.11","0.4.10","0.4.9","0.4.8","0.4.7","0.4.6","0.4.5","0.4.4","0.4.3","0.4.2.1","0.4.2","0.4.1","0.4.0","0.3.6","0.3.5","0.3.4","0.3.3","0.3.2","0.3.1","0.3","0.2.1","0.2","0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92162.json","vanir_signatures":[{"source":"https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92","target":{"file":"common/flatpak-ref-utils.c","function":"is_valid_remote_name"},"deprecated":false,"digest":{"length":292,"function_hash":"126271828766093234775715824355838056974"},"id":"CVE-2026-92162-20a3559d","signature_type":"Function","signature_version":"v1"},{"digest":{"function_hash":"125583951298092676895481159591435256762","length":7925},"id":"CVE-2026-92162-2e7f0b7d","signature_type":"Function","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"function":"handle_deploy","file":"system-helper/flatpak-system-helper.c"},"deprecated":false},{"signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"function":"handle_install_bundle","file":"system-helper/flatpak-system-helper.c"},"deprecated":false,"digest":{"function_hash":"8121134386927001398217267954807740717","length":1393},"id":"CVE-2026-92162-4e24e519","signature_type":"Function"},{"deprecated":false,"digest":{"length":2401,"function_hash":"58746212148026447831687156193047305020"},"id":"CVE-2026-92162-56eba996","signature_type":"Function","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"file":"system-helper/flatpak-system-helper.c","function":"handle_update_remote"}},{"deprecated":false,"digest":{"function_hash":"120415637857993384647819369055318048053","length":3977},"id":"CVE-2026-92162-74564c22","signature_type":"Function","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"file":"system-helper/flatpak-system-helper.c","function":"handle_deploy_appstream"}},{"signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"file":"system-helper/flatpak-system-helper.c","function":"handle_configure_remote"},"deprecated":false,"digest":{"length":2081,"function_hash":"121405783823749670610215031429922308180"},"id":"CVE-2026-92162-761fa1b0","signature_type":"Function"},{"signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"function":"handle_remove_local_ref","file":"system-helper/flatpak-system-helper.c"},"deprecated":false,"digest":{"function_hash":"238681822510721551006283740815463484530","length":1327},"id":"CVE-2026-92162-7c416c9f","signature_type":"Function"},{"target":{"file":"common/flatpak-ref-utils-private.h"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["92736542745389674858088021070013416663","195129784407135879075303966863404332174","117835201077124438671577447984722827814","27141310862705759705595207691029764499"]},"id":"CVE-2026-92162-7e83ab95","signature_type":"Line","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92"},{"id":"CVE-2026-92162-90d747d3","signature_type":"Function","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"file":"system-helper/flatpak-system-helper.c","function":"handle_generate_oci_summary"},"deprecated":false,"digest":{"function_hash":"203868197328658889502092419303003262656","length":1498}},{"id":"CVE-2026-92162-b8e8ecae","signature_type":"Line","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/01773f84021dd090b2426f79675f94f2564f9279","target":{"file":"system-helper/flatpak-system-helper.c"},"deprecated":false,"digest":{"line_hashes":["330828352570512745211341860499485210370","234625385065491327225406546027931264864","332151847707824070989231448750668885666","288704253971614182143061552298810220279","89982972554093954785435172805056522836","144064770450826998468383987527374615741","230517703740965814645011452784278338295","25758617870369576095174518073146819769","277789140612034242495189351929590904861","196196460052005872614948624165204343511","271394149674275202194725395099633370459","28431762190277481314424705209377282467","66050474276290536315394323238652390095","234625385065491327225406546027931264864","289139578843639663884229153446827600772","172614018609220153831197447180021443933","248788069221763629765700247610472105973","106250850249111392821751467903888004707","97835930062629585316410562788996761906","74468302554913091370485735611900448728","75121136740268388336701196069755764026","335785781942718455223358087334281303947","101503925174950720726185083009501946508","90017978398171759452654796369611292846","34147785710405748758945515451582814432","97835930062629585316410562788996761906","74468302554913091370485735611900448728","75121136740268388336701196069755764026","335785781942718455223358087334281303947","101503925174950720726185083009501946508","90017978398171759452654796369611292846","250939444362830824059866808401764638820","153317063930687344431115036320774719863","74468302554913091370485735611900448728","75121136740268388336701196069755764026","335785781942718455223358087334281303947","101503925174950720726185083009501946508","90017978398171759452654796369611292846","241267358948209929689045112009293051122","265144186176750436848404842107303143178","250593920688419692174898620778696836729","89413930478413958589211284511427277508"],"threshold":0.9}},{"digest":{"threshold":0.9,"line_hashes":["49565243285199383510121397710958620639","295715038708173328870554339229378847644","218686403145759286027249505498872914738","309539905519720800602232668677342094551","235517685693323566237073880941060739223","276994202875206314152635772596012063703","304250397345190184783668904174746524277","288305506782408119640955955314382295866","229024485419888381569360424026376057409","86498676687942976540370284504313953799","339872931635689164774400347413455377471","205596178198798429108221805241641067312","272511690226745621689193396046784445359","140604891813322936885476340857130104664","226308902481202039843434569093101912018","10573296711470263102171475092440192327","62054769227737662620212057178134376219","105135349804760838859480469610730392589","255537771214533412585519837482367370990","140761995614659160522981879343725292511","177332803648801402567121478747873810550","99682476474788288593942841319285589227"]},"id":"CVE-2026-92162-d1c09eb3","signature_type":"Line","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92","target":{"file":"common/flatpak-ref-utils.c"},"deprecated":false},{"digest":{"function_hash":"78381558666253716693589238141013778704","length":2610},"id":"CVE-2026-92162-f46cd2be","signature_type":"Function","signature_version":"v1","source":"https://github.com/flatpak/flatpak/commit/19456b916842b079af833a86b9ab89c5db154b92","target":{"file":"common/flatpak-ref-utils.c","function":"_flatpak_decomposed_new"},"deprecated":false}],"vanir_signatures_modified":"2026-10-21T10:50:19Z"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}