{"answers":{"affected":"1 open source package ship an affected version, including tomcat. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-55957 in the wild and no public exploit code.","fix":"Upgrade tomcat to a fixed version for your release line: 9.0.101, 10.1.37 or 11.0.5.","what":"CVE-2026-55957 is a high-severity authentication bypass vulnerability in Apache Tomcat, published on 29 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-2026-55957 and fix it if it is affected.\n\nWhat it is: CVE-2026-55957 is a high-severity authentication bypass vulnerability in Apache Tomcat, published on 29 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-2026-55957 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- tomcat (Bitnami): affected all versions; fixed in 9.0.101, 10.1.37, 11.0.5\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-2026-55957/ (Markdown: https://insights.sbomify.com/CVE-2026-55957/index.md)","id":"CVE-2026-55957","markdown":"https://insights.sbomify.com/CVE-2026-55957/index.md","name":"CVE-2026-55957","record":{"aliases":["BIT-tomcat-2026-55957","CLSA-2026-1783522891","CLSA-2026-1783591320","CLSA-2026-1784541319","CLSA-2026-1785309072","CLSA-2026-1786880824","CLSA-2026-1786880926","DEBIAN-CVE-2026-55957","GHSA-7895-gffq-w6jq","UBUNTU-CVE-2026-55957"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Attackers can bypass authentication in Apache Tomcat when JNDIRealm is configured for GSSAPI binds, allowing unauthorized access without a correct password.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"}],"cvss":{"score":7.3,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-304","name":"Missing Critical Step in Authentication"}],"description":"Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.","ecosystems":["Bitnami"],"exploits":{"exploitdb":0,"first_seen":"2026-08-07","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-07T20:02:00Z","kind":"github_poc","ref":"https://github.com/mdvpat/CVE-2026-55957-PoC","stars":0,"title":"Reproducible Docker lab for the Apache Tomcat JNDIRealm GSSAPI authentication bypass"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind","id":"CVE-2026-55957","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat"],"type":"auth_bypass","year":"2026"},"n_packages":1,"n_references":1,"next":{"headline":"Renesas TSIP TLS 1.3 transcript buffer out-of-bounds write in tsip_StoreMessage","id":"CVE-2026-55958"},"packages":[{"ecosystem":"Bitnami","fixed":["9.0.101","10.1.37","11.0.5"],"introduced":["0","10.0.0","11.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2026-55957"}],"prev":{"headline":"Apache Tomcat: Security constraints for default servlet ignored method","id":"CVE-2026-55956"},"products":["Apache Tomcat"],"published":"2026-06-29","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":"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-30","vendors":["Apache Software Foundation"]},"summary":"Attackers can bypass authentication in Apache Tomcat when JNDIRealm is configured for GSSAPI binds, allowing unauthorized access without a correct password.","url":"https://insights.sbomify.com/CVE-2026-55957/"}