{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-56091 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-56091 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-56091 is a high-severity authentication bypass vulnerability in Apache Shiro, published on 25 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-2026-56091 and fix it if it is affected.\n\nWhat it is: CVE-2026-56091 is a high-severity authentication bypass vulnerability in Apache Shiro, published on 25 Jun 2026. 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-2026-56091 in the wild and no public exploit code.\n\nAffected product: Apache Shiro. 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-2026-56091/ (Markdown: https://insights.sbomify.com/CVE-2026-56091/index.md)","id":"CVE-2026-56091","markdown":"https://insights.sbomify.com/CVE-2026-56091/index.md","name":"CVE-2026-56091","record":{"aliases":["DEBIAN-CVE-2026-56091","GHSA-qj64-jj84-w38j","UBUNTU-CVE-2026-56091"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Java security library","requires_auth":"none","summary":"Attackers can bypass authentication in Apache Shiro web applications using the shiro-guice module via crafted HTTP requests.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/S:P/AU:Y/V:D/RE:L/U:Amber","version":"4.0"},"cwes":[{"id":"CWE-289","name":"Authentication Bypass by Alternate Name"}],"description":"When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass.\nThis vulnerability is similar to  https://www.cve.org/CVERecord?id=CVE-2020-1957 https://www.cve.org/CVERecord , except that it affects the `shiro-guice` module instead of the `shiro-spring` module.\n\nThis issue affects all Apache Shiro versions through 2.x, and 3.0.0-alpha-1 only when using `shiro-guice` module in a web servlet context.\n\nUpgrade to version 3.0.0 or later, which fixes the issue.","ecosystems":[],"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":"Apache Shiro: Authentication bypass in Guice-Web integration","id":"CVE-2026-56091","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":"Broken Access Control in extension \"Apache Solr for TYPO3 - Enterprise Search\" (solr)","id":"CVE-2026-56092"},"packages":[],"prev":{"headline":"Privilege escalation in ObjectScale","id":"CVE-2026-56090"},"products":["Apache Shiro"],"published":"2026-06-25","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-25","vendors":["Apache Software Foundation"]},"summary":"Attackers can bypass authentication in Apache Shiro web applications using the shiro-guice module via crafted HTTP requests.","url":"https://insights.sbomify.com/CVE-2026-56091/"}