{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67216 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-67216 is a high-severity denial of service vulnerability in DaveGamble cJSON, published on 29 Jul 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-2026-67216 and fix it if it is affected.\n\nWhat it is: CVE-2026-67216 is a high-severity denial of service vulnerability in DaveGamble cJSON, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67216 exists.\n\nAffected product: DaveGamble cJSON. 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-2026-67216/ (Markdown: https://insights.sbomify.com/CVE-2026-67216/index.md)","id":"CVE-2026-67216","markdown":"https://insights.sbomify.com/CVE-2026-67216/index.md","name":"CVE-2026-67216","record":{"aliases":["AZL-94407","DEBIAN-CVE-2026-67216","ECHO-a8fe-5bd2-dfa4","GHSA-ff2v-f99f-wm3f","ROOT-OS-ALPINE-321-CVE-2026-67216","ROOT-OS-ALPINE-323-CVE-2026-67216","UBUNTU-CVE-2026-67216"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JSON parsing library","requires_auth":"none","summary":"An attacker can cause a denial of service by providing deeply nested JSON to cJSON_Compare, leading to exponential CPU consumption.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"cjson","vendor":"davegamble"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"cJSON through 1.7.19 contains an inefficient algorithmic complexity flaw in cJSON_Compare(). When comparing objects, the function recurses into each shared subtree twice, once in each direction, with no depth guard, making the running time exponential in nesting depth. A small, deeply nested document of a few hundred bytes (depth around 40) compared for equality consumes hours of CPU, and the cost roughly doubles with each additional level of nesting. An application that calls cJSON_Compare() on attacker-influenced JSON that is structurally equal to a reference document is exposed to a denial-of-service condition.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"cJSON cJSON_Compare Exponential Complexity Denial of Service","id":"CVE-2026-67216","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"cJSON JSON Patch Non-Atomic Application Destroys Data Before Validation","id":"CVE-2026-67217"},"packages":[],"prev":{"headline":"cJSON JSON Patch copy/add Uncontrolled Recursion Stack Exhaustion","id":"CVE-2026-67215"},"products":["cJSON"],"published":"2026-07-29","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-57052","kev_date_added":null,"published":"2025-09-03"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2019-11834","kev_date_added":null,"published":"2019-05-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2019-11835","kev_date_added":null,"published":"2019-05-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2016-10749","kev_date_added":null,"published":"2019-04-29"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2018-1000217","kev_date_added":null,"published":"2018-08-20"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2018-1000216","kev_date_added":null,"published":"2018-08-20"},{"cvss_score":8.7,"headline":"cJSON JSON Patch copy/add Uncontrolled Recursion Stack Exhaustion","id":"CVE-2026-67215","kev_date_added":null,"published":"2026-07-29"}],"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-30","vendors":["DaveGamble"]},"summary":"An attacker can cause a denial of service by providing deeply nested JSON to cJSON_Compare, leading to exponential CPU consumption.","url":"https://insights.sbomify.com/CVE-2026-67216/"}