{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-22976 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-22976 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-22976 is a high-severity denial of service vulnerability in F5 Big-Ip Advanced Web Application Firewall, published on 12 Feb 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-2021-22976 and fix it if it is affected.\n\nWhat it is: CVE-2021-22976 is a high-severity denial of service vulnerability in F5 Big-Ip Advanced Web Application Firewall, published on 12 Feb 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-2021-22976 in the wild and no public exploit code.\n\nAffected product: F5 Big-Ip Advanced Web Application Firewall. 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-2021-22976/ (Markdown: https://insights.sbomify.com/CVE-2021-22976/index.md)","id":"CVE-2021-22976","markdown":"https://insights.sbomify.com/CVE-2021-22976/index.md","name":"CVE-2021-22976","record":{"aliases":["GHSA-5m63-vxpq-9j8m"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"BIG-IP Advanced WAF","requires_auth":"none","summary":"Attackers can cause excessive CPU usage and denial of service by sending WebSocket requests with unusually large JSON payloads to BIG-IP ASM.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"f5","cpe":[{"product":"big-ip_advanced_web_application_firewall","vendor":"f5"},{"product":"big-ip_application_security_manager","vendor":"f5"}],"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":[],"description":"On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM system processes WebSocket requests with JSON payloads, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Denial of service in BIG-IP Advanced WAF \u0026 BIG-IP ASM","id":"CVE-2021-22976","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"f5:big-ip_advanced_web_application_firewall","products":["f5:big-ip_advanced_web_application_firewall","f5:big-ip_application_security_manager"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in BIG-IP","id":"CVE-2021-22977"},"packages":[],"prev":{"headline":"Denial of service in BIG-IP","id":"CVE-2021-22975"},"products":["BIG-IP Advanced WAF \u0026 BIG-IP ASM"],"published":"2021-02-12","related":[{"cvss_score":9.9,"headline":"Privilege escalation in BIG-IP Advanced WAF and BIG-IP ASM","id":"CVE-2021-23031","kev_date_added":null,"published":"2021-09-14"},{"cvss_score":8.8,"headline":"Server-side request forgery in BIG-IP Advanced WAF and BIG-IP ASM","id":"CVE-2021-23029","kev_date_added":null,"published":"2021-09-14"},{"cvss_score":8.8,"headline":"Missing authorization in BIG-IP ASM/Advanced WAF","id":"CVE-2021-23014","kev_date_added":null,"published":"2021-05-10"},{"cvss_score":8.8,"headline":"Cross-site scripting in BIG-IP Advanced WAF and BIG-IP ASM","id":"CVE-2021-22993","kev_date_added":null,"published":"2021-03-31"},{"cvss_score":8.7,"headline":"BIG-IP Advanced WAF and ASM vulnerability","id":"CVE-2026-40060","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":8.7,"headline":"BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability","id":"CVE-2026-41227","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":8.7,"headline":"BIG-IP Advanced WAF and ASM vulnerability","id":"CVE-2025-54858","kev_date_added":null,"published":"2025-10-15"}],"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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can cause excessive CPU usage and denial of service by sending WebSocket requests with unusually large JSON payloads to BIG-IP ASM.","url":"https://insights.sbomify.com/CVE-2021-22976/"}