{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-71253 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-71253 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-71253 is a critical code injection vulnerability in Apache Johnzon, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-71253 and fix it if it is affected.\n\nWhat it is: CVE-2026-71253 is a critical code injection vulnerability in Apache Johnzon, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-71253 in the wild and no public exploit code.\n\nAffected product: Apache Johnzon. 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-2026-71253/ (Markdown: https://insights.sbomify.com/CVE-2026-71253/index.md)","id":"CVE-2026-71253","markdown":"https://insights.sbomify.com/CVE-2026-71253/index.md","name":"CVE-2026-71253","record":{"aliases":["GHSA-66gj-8qvf-qvfh"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Java JSON library","requires_auth":"none","summary":"Attacker can execute arbitrary code via unsafe reflection in Apache Johnzon by providing malicious JSON input.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-470","name":"Use of Externally-Controlled Input to Select Classes or Code"}],"description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","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":"Apache Johnzon: ClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON","id":"CVE-2026-71253","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"nanoMODBUS Server-Side Out-of-Bounds Write in handle_read_file_record()","id":"CVE-2026-71254"},"packages":[],"prev":{"headline":"toner-management - Unauthenticated State-Changing Admin Actions","id":"CVE-2026-71252"},"products":["Apache Johnzon"],"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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-20","vendors":["Apache Software Foundation"]},"summary":"Attacker can execute arbitrary code via unsafe reflection in Apache Johnzon by providing malicious JSON input.","url":"https://insights.sbomify.com/CVE-2026-71253/"}