{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36721 exists.","fix":"No fix has been published for CVE-2026-36721 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-36721 is a critical authentication bypass vulnerability in n/a, published on 9 Jun 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-2026-36721 and fix it if it is affected.\n\nWhat it is: CVE-2026-36721 is a critical authentication bypass vulnerability in n/a, published on 9 Jun 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-2026-36721 exists.\n\nAffected product: n/a. 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-2026-36721/ (Markdown: https://insights.sbomify.com/CVE-2026-36721/index.md)","id":"CVE-2026-36721","markdown":"https://insights.sbomify.com/CVE-2026-36721/index.md","name":"CVE-2026-36721","record":{"aliases":["GHSA-hjjc-9hhm-h336"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["security_bypass","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Bookcars booking system","requires_auth":"none","summary":"Attackers can bypass authentication and take over accounts by forging JWT tokens due to missing signature verification in Bookcars.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","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-347","name":"Improper Verification of Cryptographic Signature"}],"description":"A lack of cryptographic signature verification in the validateAccessToken function of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Auth bypass in n/a","id":"CVE-2026-36721","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"File upload in n/a","id":"CVE-2026-36722"},"packages":[],"prev":{"headline":"Privilege escalation in n/a","id":"CVE-2026-36720"},"products":["n/a"],"published":"2026-06-09","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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-10","vendors":["n/a"]},"summary":"Attackers can bypass authentication and take over accounts by forging JWT tokens due to missing signature verification in Bookcars.","url":"https://insights.sbomify.com/CVE-2026-36721/"}