{"answers":{"affected":"2 open source packages ship an affected version, including org.jetbrains.kotlin:kotlin-gradle-plugin. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53914 in the wild and no public exploit code.","fix":"Upgrade org.jetbrains.kotlin:kotlin-gradle-plugin to 2.4.20-Beta1 or later.","what":"CVE-2026-53914 is a medium-severity unsafe deserialization vulnerability in JetBrains Kotlin, published on 26 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53914 and fix it if it is affected.\n\nWhat it is: CVE-2026-53914 is a medium-severity unsafe deserialization vulnerability in JetBrains Kotlin, published on 26 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-53914 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.jetbrains.kotlin:kotlin-gradle-plugin (Maven): affected all versions; fixed in 2.4.20-Beta1\n- org.jetbrains.kotlin:kotlin-gradle-plugin (Maven): affected all versions; fixed in 2.4.20-Beta1\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-2026-53914/ (Markdown: https://insights.sbomify.com/CVE-2026-53914/index.md)","id":"CVE-2026-53914","markdown":"https://insights.sbomify.com/CVE-2026-53914/index.md","name":"CVE-2026-53914","record":{"aliases":["CLSA-2026-1793139590","GHSA-r937-wjx7-w2jp"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Kotlin compiler toolchain","requires_auth":"high_privilege","summary":"Unsafe deserialization in Kotlin build cache metadata allows attackers to execute arbitrary code, requiring developers to upgrade the compiler.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"JetBrains","cpe":[{"product":"kotlin","vendor":"jetbrains"}],"cvss":{"score":6.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"JetBrains Kotlin: Unsafe Deserialization in Kotlin Build Cache Enables Code Execution","id":"CVE-2026-53914","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Code injection in GoLand","id":"CVE-2026-53915"},"packages":[{"ecosystem":"Maven","fixed":["2.4.20-Beta1"],"introduced":["0"],"last_affected":[],"package":"org.jetbrains.kotlin:kotlin-gradle-plugin","purl":null,"source":"GHSA-r937-wjx7-w2jp"},{"ecosystem":"Maven","fixed":["2.4.20-Beta1"],"introduced":["0"],"last_affected":[],"package":"org.jetbrains.kotlin:kotlin-gradle-plugin","purl":"pkg:maven/org.jetbrains.kotlin/kotlin-gradle-plugin","source":"GHSA-r937-wjx7-w2jp"}],"prev":{"headline":"Apache Camel: KeycloakSecurityPolicy has Improper Authentication, Missing Authentication for Critical Function and Failing Open Vulnerabilities","id":"CVE-2026-53913"},"products":["Kotlin"],"published":"2026-06-26","related":[{"cvss_score":8.8,"headline":"Privilege escalation in n/a","id":"CVE-2020-15824","kev_date_added":null,"published":"2020-08-08"},{"cvss_score":8.1,"headline":"Other in n/a","id":"CVE-2019-10101","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":8.1,"headline":"Supply chain in n/a","id":"CVE-2019-10102","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":8.1,"headline":"Other in n/a","id":"CVE-2019-10103","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":5.3,"headline":"Improper Locking in JetBrains Kotlin","id":"CVE-2022-24329","kev_date_added":null,"published":"2022-02-25"},{"cvss_score":5.3,"headline":"Incorrect Default Permissions in JetBrains Kotlin","id":"CVE-2020-29582","kev_date_added":null,"published":"2021-02-03"}],"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":"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":"2026-06-27","vendors":["JetBrains"]},"summary":"Unsafe deserialization in Kotlin build cache metadata allows attackers to execute arbitrary code, requiring developers to upgrade the compiler.","url":"https://insights.sbomify.com/CVE-2026-53914/"}