{"answers":{"affected":"3 open source packages ship an affected version, including github.com/canonical/lxd. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34178 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-34178 is a critical vulnerability in Canonical lxd, published on 9 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34178 and fix it if it is affected.\n\nWhat it is: CVE-2026-34178 is a critical vulnerability in Canonical lxd, published on 9 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34178 exists.\n\nAffected packages and fixed versions:\n- github.com/canonical/lxd (Go): affected from 0.0.0-20210305023314-538ac3df036e; no fix listed\n- github.com/canonical/lxd (Go): affected from 0.0.0-20210305023314-538ac3df036e up to 0.0.0-20260226085519-736f34afb267; no fix listed\n- github.com/canonical/lxd (Go): affected from 0.0.0-20210305023314-538ac3df036e up to 0.0.0-20260226085519-736f34afb267; no fix listed\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-34178/ (Markdown: https://insights.sbomify.com/CVE-2026-34178/index.md)","id":"CVE-2026-34178","markdown":"https://insights.sbomify.com/CVE-2026-34178/index.md","name":"CVE-2026-34178","record":{"aliases":["DEBIAN-CVE-2026-34178","GHSA-q96j-3fmm-7fv4","GO-2026-5576","UBUNTU-CVE-2026-34178"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"upgrade","impacts":["privilege_escalation","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"LXD container manager","requires_auth":"high_privilege","summary":"Authenticated attackers can bypass LXD project restrictions by crafting backup archives, enabling privileged container creation and host compromise.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"canonical","cpe":[{"product":"lxd","vendor":"canonical"}],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Importing a crafted backup leads to project restriction bypass","id":"CVE-2026-34178","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Update of type field in restricted TLS certificate allows privilege escalation to cluster admin","id":"CVE-2026-34179"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0.0.0-20210305023314-538ac3df036e"],"last_affected":[],"package":"github.com/canonical/lxd","purl":"pkg:golang/github.com/canonical/lxd","source":"GO-2026-5576"},{"ecosystem":"Go","fixed":[],"introduced":["0.0.0-20210305023314-538ac3df036e"],"last_affected":["0.0.0-20260226085519-736f34afb267"],"package":"github.com/canonical/lxd","purl":null,"source":"GHSA-q96j-3fmm-7fv4"},{"ecosystem":"Go","fixed":[],"introduced":["0.0.0-20210305023314-538ac3df036e"],"last_affected":["0.0.0-20260226085519-736f34afb267"],"package":"github.com/canonical/lxd","purl":"pkg:golang/github.com/canonical/lxd","source":"GHSA-q96j-3fmm-7fv4"}],"prev":{"headline":"VM lowlevel restriction bypass via raw.apparmor and raw.qemu.conf","id":"CVE-2026-34177"},"products":["lxd"],"published":"2026-04-09","related":[{"cvss_score":9.9,"headline":"Instance template path traversal allows arbitrary host file write as root","id":"CVE-2026-66897","kev_date_added":null,"published":"2026-08-24"},{"cvss_score":9.9,"headline":"Cross-project cluster migration bypasses project restrictions via cluster notification flag","id":"CVE-2026-62420","kev_date_added":null,"published":"2026-08-12"},{"cvss_score":9.9,"headline":"Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root","id":"CVE-2026-63293","kev_date_added":null,"published":"2026-08-12"},{"cvss_score":9.9,"headline":"Root RCE via image backup.yaml symlink","id":"CVE-2026-63294","kev_date_added":null,"published":"2026-08-12"},{"cvss_score":9.9,"headline":"Project restriction bypass via instance migration config override","id":"CVE-2026-63296","kev_date_added":null,"published":"2026-08-12"},{"cvss_score":9.9,"headline":"Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge","id":"CVE-2026-63297","kev_date_added":null,"published":"2026-08-12"},{"cvss_score":9.9,"headline":"Cross-project instance move bypasses all project restrictions allowing host command execution","id":"CVE-2026-63300","kev_date_added":null,"published":"2026-08-12"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-09","vendors":["Canonical"]},"summary":"Authenticated attackers can bypass LXD project restrictions by crafting backup archives, enabling privileged container creation and host compromise.","url":"https://insights.sbomify.com/CVE-2026-34178/"}