{"answers":{"affected":"6 open source packages ship an affected version, including org.apache.tomcat:tomcat. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-4858 exists.","fix":"Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 5.5.35, 6.0.35 or 7.0.23.","what":"CVE-2011-4858 is a medium-severity denial of service vulnerability in Apache Tomcat, published on 5 Jan 2012. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2011-4858 and fix it if it is affected.\n\nWhat it is: CVE-2011-4858 is a medium-severity denial of service vulnerability in Apache Tomcat, published on 5 Jan 2012. 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-2011-4858 exists.\n\nAffected packages and fixed versions:\n- org.apache.tomcat:tomcat (Maven): affected from 5.5.0; fixed in 5.5.35\n- org.apache.tomcat:tomcat (Maven): affected from 5.5.0; fixed in 5.5.35\n- org.apache.tomcat:tomcat (Maven): affected from 6.0.0; fixed in 6.0.35\n- org.apache.tomcat:tomcat (Maven): affected from 6.0.0; fixed in 6.0.35\n- org.apache.tomcat:tomcat (Maven): affected from 7.0.0; fixed in 7.0.23\n- org.apache.tomcat:tomcat (Maven): affected from 7.0.0; fixed in 7.0.23\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-2011-4858/ (Markdown: https://insights.sbomify.com/CVE-2011-4858/index.md)","id":"CVE-2011-4858","markdown":"https://insights.sbomify.com/CVE-2011-4858/index.md","name":"CVE-2011-4858","record":{"aliases":["CVE-2011-4084","GHSA-wr3m-gw98-mc3j"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Remote attackers can cause denial of service via CPU exhaustion by sending crafted form parameters that trigger hash collisions in Apache Tomcat.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"tomcat","vendor":"apache"}],"cvss":{"score":5,"severity":"medium","source":"nvd","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","version":"2.0"},"cwes":[{"id":"CWE-399","name":null}],"description":"Apache Tomcat before 5.5.35, 6.x before 6.0.35, and 7.x before 7.0.23 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.","ecosystems":["Maven"],"exploits":{"exploitdb":1,"first_seen":"2006-07-15","github_poc":0,"max_poc_stars":null,"metasploit":1,"nuclei":0,"refs":[{"date":"2006-07-15","kind":"exploitdb","ref":"2012","stars":null,"title":"MyBulletinBoard (MyBB) 1.1.5 - 'CLIENT-IP' SQL Injection"},{"date":"2011-12-28","kind":"metasploit","ref":"auxiliary/dos/http/hashcollision_dos","stars":null,"title":"Hashtable Collisions"}],"tier":"weaponised"},"has_fix":true,"headline":"Improper Input Validation in Apache Tomcat","id":"CVE-2011-4858","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"apache:tomcat","products":["apache:tomcat"],"type":"denial_of_service","year":"2011"},"n_packages":6,"n_references":29,"next":{"headline":"Hardcoded credentials in n/a","id":"CVE-2011-4859"},"packages":[{"ecosystem":"Maven","fixed":["5.5.35"],"introduced":["5.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-wr3m-gw98-mc3j"},{"ecosystem":"Maven","fixed":["5.5.35"],"introduced":["5.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-wr3m-gw98-mc3j"},{"ecosystem":"Maven","fixed":["6.0.35"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-wr3m-gw98-mc3j"},{"ecosystem":"Maven","fixed":["6.0.35"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-wr3m-gw98-mc3j"},{"ecosystem":"Maven","fixed":["7.0.23"],"introduced":["7.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-wr3m-gw98-mc3j"},{"ecosystem":"Maven","fixed":["7.0.23"],"introduced":["7.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-wr3m-gw98-mc3j"}],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2011-4857"},"products":["n/a"],"published":"2012-01-05","related":[{"cvss_score":10,"headline":"Apache Tomcat Path Equivalence","id":"CVE-2025-24813","kev_date_added":"2025-04-01","published":"2025-03-10"},{"cvss_score":9.8,"headline":"Apache Tomcat Remote Code Execution","id":"CVE-2016-8735","kev_date_added":"2023-05-12","published":"2017-04-06"},{"cvss_score":8.1,"headline":"Apache Tomcat Remote Code Execution","id":"CVE-2017-12617","kev_date_added":"2022-03-25","published":"2017-10-03"},{"cvss_score":8.1,"headline":"Apache Tomcat on Windows Remote Code Execution","id":"CVE-2017-12615","kev_date_added":"2022-03-25","published":"2017-09-19"},{"cvss_score":7.5,"headline":"Apache Tomcat Missing Encryption of Sensitive Data","id":"CVE-2026-34486","kev_date_added":"2026-08-04","published":"2026-04-09"},{"cvss_score":9.8,"headline":"Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete","id":"CVE-2026-65637","kev_date_added":null,"published":"2026-08-25"},{"cvss_score":9.8,"headline":"Apache Tomcat: Limited replay attack possible with DIGEST authentication","id":"CVE-2026-65905","kev_date_added":null,"published":"2026-08-25"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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)"},{"class":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-07","vendors":["n/a"]},"summary":"Remote attackers can cause denial of service via CPU exhaustion by sending crafted form parameters that trigger hash collisions in Apache Tomcat.","url":"https://insights.sbomify.com/CVE-2011-4858/"}