{"answers":{"affected":"1 open source package ship an affected version, including joomla. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-26036 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-26036 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-26036 is a high-severity denial of service vulnerability in Joomla Joomla\\!, published on 7 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-26036 and fix it if it is affected.\n\nWhat it is: CVE-2021-26036 is a high-severity denial of service vulnerability in Joomla Joomla\\!, published on 7 Jul 2021. 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-2021-26036 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- joomla (Bitnami): affected from 2.5.0 up to 3.9.27; no fix listed\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-2021-26036/ (Markdown: https://insights.sbomify.com/CVE-2021-26036/index.md)","id":"CVE-2021-26036","markdown":"https://insights.sbomify.com/CVE-2021-26036/index.md","name":"CVE-2021-26036","record":{"aliases":["BIT-joomla-2021-26036","GHSA-g983-3grj-v7qw"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Joomla CMS","requires_auth":"none","summary":"Attackers can cause a denial of service in Joomla by manipulating the usergroups table due to missing input validation.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Joomla","cpe":[{"product":"joomla\\!","vendor":"joomla"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"An issue was discovered in Joomla! 2.5.0 through 3.9.27. Missing validation of input could lead to a broken usergroups table.","ecosystems":["Bitnami"],"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":"[20210702] - Core - DoS through usergroup table manipulation","id":"CVE-2021-26036","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"joomla:joomla\\!","products":["joomla:joomla\\!"],"type":"denial_of_service","year":"2021"},"n_packages":1,"n_references":1,"next":{"headline":"[20210703] - Core - Lack of enforced session termination","id":"CVE-2021-26037"},"packages":[{"ecosystem":"Bitnami","fixed":[],"introduced":["2.5.0"],"last_affected":["3.9.27"],"package":"joomla","purl":"pkg:bitnami/joomla","source":"BIT-joomla-2021-26036"}],"prev":{"headline":"[20210701] - Core - XSS in JForm Rules field","id":"CVE-2021-26035"},"products":["Joomla! CMS"],"published":"2021-07-07","related":[{"cvss_score":9.8,"headline":"PHPMailer Command Injection","id":"CVE-2016-10033","kev_date_added":"2025-07-07","published":"2016-12-30"},{"cvss_score":5.3,"headline":"Joomla! Improper Access Control","id":"CVE-2023-23752","kev_date_added":"2024-01-08","published":"2023-02-16"},{"cvss_score":9.8,"headline":"Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links","id":"CVE-2026-48902","kev_date_added":null,"published":"2026-05-26"},{"cvss_score":9.8,"headline":"[20250401] - Joomla Framework - SQL injection vulnerability in quoteNameStr method of Database package","id":"CVE-2025-25226","kev_date_added":null,"published":"2025-04-08"},{"cvss_score":9.8,"headline":"[20220303] - Core - User row are not bound to a authentication mechanism","id":"CVE-2022-23795","kev_date_added":null,"published":"2022-03-30"},{"cvss_score":9.8,"headline":"[20220305] - Core - Inadequate filtering on the selected Ids","id":"CVE-2022-23797","kev_date_added":null,"published":"2022-03-30"},{"cvss_score":9.8,"headline":"[20220307] - Core - Variable Tampering on JInput $_REQUEST data","id":"CVE-2022-23799","kev_date_added":null,"published":"2022-03-30"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-02-25","vendors":["Joomla! Project"]},"summary":"Attackers can cause a denial of service in Joomla by manipulating the usergroups table due to missing input validation.","url":"https://insights.sbomify.com/CVE-2021-26036/"}