{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-109434 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-109434 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-109434 is a medium-severity vulnerability in Fenrir Sleipnir Mobile for Android, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-109434 and fix it if it is affected.\n\nWhat it is: CVE-2026-109434 is a medium-severity vulnerability in Fenrir Sleipnir Mobile for Android, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-109434 in the wild and no public exploit code.\n\nAffected product: Fenrir Sleipnir Mobile for Android. 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-2026-109434/ (Markdown: https://insights.sbomify.com/CVE-2026-109434/index.md)","id":"CVE-2026-109434","markdown":"https://insights.sbomify.com/CVE-2026-109434/index.md","name":"CVE-2026-109434","record":{"aliases":["GHSA-6cmm-rr3r-h5xv"],"analysis":{"component_type":"browser","fix_type":"upgrade","impacts":["account_takeover","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Android browser","requires_auth":"none","summary":"Attackers can spoof the address bar in fullscreen mode to trick users into revealing credentials or installing malware on Sleipnir Browser for Android.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-451","name":"User Interface (UI) Misrepresentation of Critical Information"}],"description":"Fenrir Sleipnir Browser for Android before 3.9.0 contains a UI spoofing vulnerability that allows remote attackers to impersonate the browser's trusted address bar by entering fullscreen mode via the Fullscreen API without displaying a persistent notification or trusted-origin indicator. Attackers can render a counterfeit address bar showing a trusted origin over attacker-controlled content after a single user tap, enabling credential harvesting, malware delivery, or social engineering through fake login, update, or payment pages.","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":"Sleipnir Browser \u003c 3.9.0 Fullscreen Address Bar Spoofing","id":"CVE-2026-109434","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Cognition \u003c 0.13.0 Unauthenticated RCE via Local Shell Backend","id":"CVE-2026-109437"},"packages":[],"prev":{"headline":"Camunda Broken Access Control via Cockpit","id":"CVE-2026-109433"},"products":["Sleipnir Mobile for Android"],"published":"2026-10-19","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Fenrir"]},"summary":"Attackers can spoof the address bar in fullscreen mode to trick users into revealing credentials or installing malware on Sleipnir Browser for Android.","url":"https://insights.sbomify.com/CVE-2026-109434/"}