{"answers":{"affected":"4 open source packages ship an affected version, including org.apache.shiro:shiro-core. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43827 in the wild and no public exploit code.","fix":"Upgrade org.apache.shiro:shiro-core to a fixed version for your release line: 2.2.0 or 3.0.0-alpha-2.","what":"CVE-2026-43827 is a medium-severity authentication bypass vulnerability in Apache Shiro, published on 25 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-43827 and fix it if it is affected.\n\nWhat it is: CVE-2026-43827 is a medium-severity authentication bypass vulnerability in Apache Shiro, published on 25 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-43827 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.shiro:shiro-core (Maven): affected from 1.0.0-incubating; fixed in 2.2.0\n- org.apache.shiro:shiro-core (Maven): affected from 1.0.0-incubating; fixed in 2.2.0\n- org.apache.shiro:shiro-core (Maven): affected from 3.0.0-alpha-1; fixed in 3.0.0-alpha-2\n- org.apache.shiro:shiro-core (Maven): affected from 3.0.0-alpha-1; fixed in 3.0.0-alpha-2\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-2026-43827/ (Markdown: https://insights.sbomify.com/CVE-2026-43827/index.md)","id":"CVE-2026-43827","markdown":"https://insights.sbomify.com/CVE-2026-43827/index.md","name":"CVE-2026-43827","record":{"aliases":["CLEANSTART-2026-YW87633","DEBIAN-CVE-2026-43827","ECHO-46dc-0019-0617","GHSA-fcvm-3cpj-f9qx","MINI-324g-j2h7-g92f","MINI-3456-qm86-wgrf","MINI-37rw-2v57-84q5","MINI-3899-g9g2-876p","MINI-3h84-4hgv-3f4p","MINI-3xj3-xc2g-gg63","MINI-56j8-2fwp-g9jq","MINI-5rpm-fxf7-vmrp","MINI-5w77-f2gg-97qr","MINI-7ph9-58mq-843q","MINI-7vqm-2rqr-48r9","MINI-83qw-pmf3-f3j2","MINI-97hm-x394-pr5h","MINI-9gj4-fp3f-7q39","MINI-cg87-pv48-3q66","MINI-f8jj-6393-mcvg","MINI-ffrw-j969-49mr","MINI-grwv-6fcp-8wmr","MINI-jpqr-rrxv-vcg3","MINI-pjf6-4xmg-6wqr","MINI-rjxf-465h-67q9","MINI-v6c5-xc8m-67fj","MINI-x3jj-x46q-g7gf","UBUNTU-CVE-2026-43827"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Java security library","requires_auth":"none","summary":"Attackers can hijack user sessions because Apache Shiro does not regenerate session IDs after login by default, allowing session fixation attacks.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"shiro","vendor":"apache"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/R:U/RE:L/U:Amber","version":"4.0"},"cwes":[{"id":"CWE-384","name":"Session Fixation"}],"description":"Default configurations of Apache Shiro have a session fixation vulnerability.\n\nThis issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1.\n\nUsers are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue.\n\nIn the affected versions, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Apache Shiro: Session fixation: new session is not created after login by default","id":"CVE-2026-43827","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Apache Shiro: Shiro's native session and rememberMe cookies do not have secure flag set by default","id":"CVE-2026-43828"},"packages":[{"ecosystem":"Maven","fixed":["2.2.0"],"introduced":["1.0.0-incubating"],"last_affected":[],"package":"org.apache.shiro:shiro-core","purl":null,"source":"GHSA-fcvm-3cpj-f9qx"},{"ecosystem":"Maven","fixed":["2.2.0"],"introduced":["1.0.0-incubating"],"last_affected":[],"package":"org.apache.shiro:shiro-core","purl":"pkg:maven/org.apache.shiro/shiro-core","source":"GHSA-fcvm-3cpj-f9qx"},{"ecosystem":"Maven","fixed":["3.0.0-alpha-2"],"introduced":["3.0.0-alpha-1"],"last_affected":[],"package":"org.apache.shiro:shiro-core","purl":null,"source":"GHSA-fcvm-3cpj-f9qx"},{"ecosystem":"Maven","fixed":["3.0.0-alpha-2"],"introduced":["3.0.0-alpha-1"],"last_affected":[],"package":"org.apache.shiro:shiro-core","purl":"pkg:maven/org.apache.shiro/shiro-core","source":"GHSA-fcvm-3cpj-f9qx"}],"prev":{"headline":"Apache Airflow Providers OpenSearch: OpenSearch task-log handler leaks credentials embedded in the host URL","id":"CVE-2026-43826"},"products":["Apache Shiro"],"published":"2026-05-25","related":[{"cvss_score":9.8,"headline":"Path Traversal in Apache Shiro","id":"CVE-2023-34478","kev_date_added":null,"published":"2023-07-24"},{"cvss_score":9.8,"headline":"Authentication Bypass Vulnerability in Shiro when forwarding or including via RequestDispatcher","id":"CVE-2022-40664","kev_date_added":null,"published":"2022-10-12"},{"cvss_score":9.8,"headline":"Authentication Bypass Vulnerability","id":"CVE-2022-32532","kev_date_added":null,"published":"2022-06-28"},{"cvss_score":9.8,"headline":"Apache Shiro vulnerable to a specially crafted HTTP request causing an authentication bypass","id":"CVE-2021-41303","kev_date_added":null,"published":"2021-09-17"},{"cvss_score":9.8,"headline":"Authentication bypass in Apache Shiro","id":"CVE-2020-17523","kev_date_added":null,"published":"2021-02-03"},{"cvss_score":9.8,"headline":"Authentication bypass in Apache Shiro","id":"CVE-2020-17510","kev_date_added":null,"published":"2020-11-05"},{"cvss_score":9.8,"headline":"Improper Authentication in Apache Shiro","id":"CVE-2020-11989","kev_date_added":null,"published":"2020-06-22"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-26","vendors":["Apache Software Foundation"]},"summary":"Attackers can hijack user sessions because Apache Shiro does not regenerate session IDs after login by default, allowing session fixation attacks.","url":"https://insights.sbomify.com/CVE-2026-43827/"}