{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-3091 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-3091 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-3091 is a medium-severity path traversal vulnerability in Synology Presto Client, published on 24 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-3091 and fix it if it is affected.\n\nWhat it is: CVE-2026-3091 is a medium-severity path traversal vulnerability in Synology Presto Client, published on 24 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-3091 in the wild and no public exploit code.\n\nAffected product: Synology Presto Client. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-3091/ (Markdown: https://insights.sbomify.com/CVE-2026-3091/index.md)","id":"CVE-2026-3091","markdown":"https://insights.sbomify.com/CVE-2026-3091/index.md","name":"CVE-2026-3091","record":{"aliases":["GHSA-fj46-cfm8-7pc4"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_read","data_modify","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Synology Presto Client","requires_auth":"low_privilege","summary":"Local attackers can read or write arbitrary files and cause denial of service by placing a malicious DLL in the installer directory.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"synology","cpe":[{"product":"presto_client","vendor":"synology"}],"cvss":{"score":6.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-427","name":"Uncontrolled Search Path Element"}],"description":"An uncontrolled search path element vulnerability in Synology Presto Client before 2.1.3-0672 allows local users to read or write arbitrary files and conduct denial-of-service during installation by placing a malicious DLL in advance in the same directory as the installer.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Path traversal in Synology Presto Client","id":"CVE-2026-3091","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab","id":"CVE-2026-3093"},"packages":[],"prev":{"headline":"Post SMTP \u003c= 3.8.0 - Unauthenticated Stored Cross-Site Scripting via 'event_type'","id":"CVE-2026-3090"},"products":["Synology Presto Client"],"published":"2026-02-24","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-02","vendors":["Synology"]},"summary":"Local attackers can read or write arbitrary files and cause denial of service by placing a malicious DLL in the installer directory.","url":"https://insights.sbomify.com/CVE-2026-3091/"}