{"answers":{"affected":"1 open source package ship an affected version, including nats. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-58209 in the wild and no public exploit code.","fix":"Upgrade nats to a fixed version for your release line: 2.12.12 or 2.14.3.","what":"CVE-2026-58209 is a medium-severity missing authorization vulnerability in nats-io nats-server, published on 8 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-58209 and fix it if it is affected.\n\nWhat it is: CVE-2026-58209 is a medium-severity missing authorization vulnerability in nats-io nats-server, published on 8 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-58209 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nats (Bitnami): affected all versions; fixed in 2.12.12, 2.14.3\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-2026-58209/ (Markdown: https://insights.sbomify.com/CVE-2026-58209/index.md)","id":"CVE-2026-58209","markdown":"https://insights.sbomify.com/CVE-2026-58209/index.md","name":"CVE-2026-58209","record":{"aliases":["AZL-92256","BIT-nats-2026-58209","DEBIAN-CVE-2026-58209","GHSA-7qmq-8cc4-hxwg","JLSEC-2026-1146","MINI-c2c3-6rqc-pwvw","MINI-m5gm-7338-f89g","UBUNTU-CVE-2026-58209"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"NATS messaging server","requires_auth":"low_privilege","summary":"Attackers can bypass subscribe deny filters to receive unauthorized MQTT retained or replayed messages in NATS Server.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nats-server","vendor":"linuxfoundation"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","ecosystems":["Bitnami"],"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":"NATS Server: MQTT retained and QoS replay bypass subscribe deny filters","id":"CVE-2026-58209","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":1,"n_references":5,"next":{"headline":"NATS Server: MQTT partial CONNECT packets can exhaust pre-auth memory","id":"CVE-2026-58210"},"packages":[{"ecosystem":"Bitnami","fixed":["2.12.12","2.14.3"],"introduced":["0","2.14.0"],"last_affected":[],"package":"nats","purl":"pkg:bitnami/nats","source":"BIT-nats-2026-58209"}],"prev":{"headline":"NATS Server: MQTT-over-WebSocket Path Can Crash WebSocket-Only JetStream Servers Before MQTT Is Enabled","id":"CVE-2026-58208"},"products":["nats-server"],"published":"2026-07-08","related":[{"cvss_score":9.8,"headline":"NATS nats-server allows directory traversal via unintended path to a management action","id":"CVE-2022-28357","kev_date_added":null,"published":"2023-09-19"},{"cvss_score":8.8,"headline":"NATS Server: Route API Auth Bypass","id":"CVE-2026-58253","kev_date_added":null,"published":"2026-07-08"},{"cvss_score":8.8,"headline":"Incorrect Authorization in NATS nats-server","id":"CVE-2022-24450","kev_date_added":null,"published":"2022-02-08"},{"cvss_score":8.6,"headline":"NATS has MQTT plaintext password disclosure","id":"CVE-2026-33216","kev_date_added":null,"published":"2026-03-25"},{"cvss_score":7.7,"headline":"NATS Server: Remote crash via integer overflow in Connz pagination","id":"CVE-2026-58207","kev_date_added":null,"published":"2026-07-08"},{"cvss_score":7.5,"headline":"NATS Server: MQTT partial CONNECT packets can exhaust pre-auth memory","id":"CVE-2026-58210","kev_date_added":null,"published":"2026-07-08"},{"cvss_score":7.5,"headline":"NATS Server: Pre-auth server crash via double INFO in leafnode handshake","id":"CVE-2026-58250","kev_date_added":null,"published":"2026-07-08"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-09","vendors":["nats-io"]},"summary":"Attackers can bypass subscribe deny filters to receive unauthorized MQTT retained or replayed messages in NATS Server.","url":"https://insights.sbomify.com/CVE-2026-58209/"}