{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-12254 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-12254 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-12254 is a medium-severity vulnerability in Netskope Client, 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-2026-12254 and fix it if it is affected.\n\nWhat it is: CVE-2026-12254 is a medium-severity vulnerability in Netskope Client, 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-2026-12254 in the wild and no public exploit code.\n\nAffected product: Netskope 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-2026-12254/ (Markdown: https://insights.sbomify.com/CVE-2026-12254/index.md)","id":"CVE-2026-12254","markdown":"https://insights.sbomify.com/CVE-2026-12254/index.md","name":"CVE-2026-12254","record":{"aliases":["GHSA-4fcp-xcp9-9vm6"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["security_bypass","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Netskope Client","requires_auth":"none","summary":"Attackers can bypass Secure Web Gateway protections via rogue captive portals, enabling access to malicious sites or data exfiltration.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Netskope","cpe":[],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-613","name":"DEPRECATED: Insufficient Session Expiration"}],"description":"Netskope is notified about a potential gap in its agent (NSClient) where a system with Netskope Client while connecting to an access point with Captive Portal switches to a Network which already has internet connectivity, the Captive Portal does not close. This allows the possibility of abuse via the Captive Portal using a rogue access point to either access malicious sites or exfiltrate data.The issue impacts all versions prior to R142","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":"Netskope Client Captive Portal WebView Persistence allowing SWG bypass issue","id":"CVE-2026-12254","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"MainWP Child \u003c 6.1.2 - Unauthenticated Administrator Authentication Bypass via Passwordless Site Registration","id":"CVE-2026-12255"},"packages":[],"prev":{"headline":"Untrusted JAR Code Execution in Multiple Stanford Interface Classes in nltk/nltk","id":"CVE-2026-12252"},"products":["Netskope Client"],"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":"2026-10-21","vendors":["Netskope Inc."]},"summary":"Attackers can bypass Secure Web Gateway protections via rogue captive portals, enabling access to malicious sites or data exfiltration.","url":"https://insights.sbomify.com/CVE-2026-12254/"}