{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-123839 in the wild and no public exploit code.","exposure":"","fix":"No fix has been published for CVE-2026-123839 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-123839 is a medium-severity vulnerability in JetBrains IntelliJ IDEA, published on 6 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123839 and fix it if it is affected.\n\nWhat it is: CVE-2026-123839 is a medium-severity vulnerability in JetBrains IntelliJ IDEA, published on 6 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123839 in the wild and no public exploit code.\n\nAffected product: JetBrains IntelliJ IDEA. 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-2026-123839/ (Markdown: https://insights.sbomify.com/CVE-2026-123839/index.md)","id":"CVE-2026-123839","markdown":"https://insights.sbomify.com/CVE-2026-123839/index.md","name":"CVE-2026-123839","record":{"aliases":["GHSA-9x95-36v2-wjrr"],"analysis":null,"analysis_generated_by":null,"assigner":"JetBrains","cpe":[{"name":"JetBrains IntelliJ IDEA","product":"intellij_idea","vendor":"jetbrains"}],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-357","name":"Insufficient UI Warning of Dangerous Operations"}],"description":"In JetBrains IntelliJ IDEA before 2026.3 opening arbitrary URLs without confirmation was possible via the Remote Development port forwarding model","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"In JetBrains IntelliJ IDEA before 2026.3 opening arbitrary URLs without confirmation was possible via the Remote Development port forwarding","id":"CVE-2026-123839","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"jetbrains:intellij_idea","products":["jetbrains:intellij_idea"],"type":null,"year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs","id":"CVE-2026-123840"},"nickname":null,"packages":[],"prev":{"headline":"In JetBrains IntelliJ IDEA before 2026.3 code execution was possible in Safe Mode via UI Designer form file","id":"CVE-2026-123838"},"products":["IntelliJ IDEA"],"published":"2026-11-06","related":[{"cvss_score":10,"headline":"In JetBrains IntelliJ IDEA before 2026.2 unauthorized input injection was possible in a Remote Development session","id":"CVE-2026-64812","kev_date_added":null,"published":"2026-07-23"},{"cvss_score":10,"headline":"In JetBrains IntelliJ IDEA before 2026.2 unauthorized settings modification was possible in a Remote Development session","id":"CVE-2026-64813","kev_date_added":null,"published":"2026-07-23"},{"cvss_score":9.8,"headline":"In JetBrains IntelliJ IDEA before 2020.1, the license server could be resolved to an untrusted host in some cases.","id":"CVE-2020-11690","kev_date_added":null,"published":"2020-04-22"},{"cvss_score":9.8,"headline":"In several JetBrains IntelliJ IDEA Ultimate versions, an Application Server run configuration (for Tomcat, Jetty, Resin, or CloudBees) with","id":"CVE-2019-10104","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":9.8,"headline":"In several JetBrains IntelliJ IDEA versions, a Spring Boot run configuration with the default setting allowed remote attackers to execute co","id":"CVE-2019-9186","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":9.8,"headline":"In several JetBrains IntelliJ IDEA versions, creating remote run configurations of JavaEE application servers leads to saving a cleartext re","id":"CVE-2019-9823","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":9.8,"headline":"In several versions of JetBrains IntelliJ IDEA Ultimate, creating Task Servers configurations leads to saving a cleartext unencrypted record","id":"CVE-2019-9873","kev_date_added":null,"published":"2019-07-03"}],"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":"partial"},"state":"PUBLISHED","updated":"2026-11-06","vendors":["JetBrains"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123839/"}