{"answers":{"affected":"1 open source package ship an affected version, including rabbitmq. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44838 in the wild and no public exploit code.","fix":"Upgrade rabbitmq to 4.2.4 or later.","what":"CVE-2026-44838 is a medium-severity vulnerability in Broadcom Rabbitmq Server, published on 27 May 2026."},"fix_prompt":"Check this codebase for CVE-2026-44838 and fix it if it is affected.\n\nWhat it is: CVE-2026-44838 is a medium-severity vulnerability in Broadcom Rabbitmq Server, published on 27 May 2026. \nExploitation: There is no known exploitation of CVE-2026-44838 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rabbitmq (Bitnami): affected from 4.2.0; fixed in 4.2.4\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-2026-44838/ (Markdown: https://insights.sbomify.com/CVE-2026-44838/index.md)","id":"CVE-2026-44838","markdown":"https://insights.sbomify.com/CVE-2026-44838/index.md","name":"CVE-2026-44838","record":{"aliases":["BIT-rabbitmq-2026-44838","GHSA-x866-xp2g-cx8v","RHSA-2026:42387","RHSA-2026:45128"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[{"product":"rabbitmq_server","vendor":"broadcom"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"RabbitMQ is a messaging and streaming broker. From 4.2.0 to before 4.2.4, RabbitMQ's MQTT plugin allows for topic-level authorization using regular expressions with variable substitution. Administrators can create patterns such as ^{client_id}-sensors$ to restrict user access to topics that include their client ID. However, the client_id is provided by the user in the MQTT CONNECT packet and is inserted into the regex pattern without escaping special regex characters. This flaw enables an authenticated MQTT user to inject regex operators to bypass authorization. This vulnerability is fixed in 4.2.4 and 4.3.0.","ecosystems":["Bitnami","Red Hat:hummingbird:1"],"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":"RabbitMQ MQTT Topic Permission Authorization Bypass","id":"CVE-2026-44838","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"broadcom:rabbitmq_server","products":["broadcom:rabbitmq_server"],"type":null,"year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"RabbitMQ: Unsanitized vhost names allow for XSS in management UI","id":"CVE-2026-44839"},"packages":[{"ecosystem":"Bitnami","fixed":["4.2.4"],"introduced":["4.2.0"],"last_affected":[],"package":"rabbitmq","purl":"pkg:bitnami/rabbitmq","source":"BIT-rabbitmq-2026-44838"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:4.2.9-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"rabbitmq-server4.2","purl":"pkg:rpm/redhat/rabbitmq-server4.2","source":"RHSA-2026:42387"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:4.3.4-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"rabbitmq-server4.3","purl":"pkg:rpm/redhat/rabbitmq-server4.3","source":"RHSA-2026:45128"}],"prev":{"headline":"view_component: System Test Entry Point Path Check Allows Sibling Directory Escape","id":"CVE-2026-44837"},"products":["rabbitmq-server"],"published":"2026-05-27","related":[{"cvss_score":9.8,"headline":"Auth bypass in Pivotal RabbitMQ 3.x before 3.5.8 and 3.6.x before 3.6.6; RabbitMQ for PCF 1.5.x before 1.5.20, 1.6.x before 1.6.12 and 1.7.x before 1.7.7","id":"CVE-2016-9877","kev_date_added":null,"published":"2016-12-29"},{"cvss_score":9.2,"headline":"RabbitMQ: OAuth2 silent verify_none fallback for JWKS fetch","id":"CVE-2026-67404","kev_date_added":null,"published":"2026-09-23"},{"cvss_score":9.1,"headline":"RabbitMQ: Trust-store whitelist by Issuer+Serial only","id":"CVE-2026-67231","kev_date_added":null,"published":"2026-09-23"},{"cvss_score":8.7,"headline":"Information disclosure in rabbitmq-server","id":"CVE-2026-57219","kev_date_added":null,"published":"2026-07-10"},{"cvss_score":8.2,"headline":"RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /login","id":"CVE-2026-67236","kev_date_added":null,"published":"2026-09-25"},{"cvss_score":8.2,"headline":"RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS","id":"CVE-2026-67409","kev_date_added":null,"published":"2026-09-25"},{"cvss_score":8.2,"headline":"RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint","id":"CVE-2026-67410","kev_date_added":null,"published":"2026-09-25"}],"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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2026-05-28","vendors":["rabbitmq"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-44838/"}