{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27890 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-27890 is a high-severity denial of service vulnerability in FirebirdSQL firebird, published on 17 Apr 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-2026-27890 and fix it if it is affected.\n\nWhat it is: CVE-2026-27890 is a high-severity denial of service vulnerability in FirebirdSQL firebird, published on 17 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27890 exists.\n\nAffected product: FirebirdSQL firebird. 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-2026-27890/ (Markdown: https://insights.sbomify.com/CVE-2026-27890/index.md)","id":"CVE-2026-27890","markdown":"https://insights.sbomify.com/CVE-2026-27890/index.md","name":"CVE-2026-27890","record":{"aliases":["DEBIAN-CVE-2026-27890","ECHO-45ec-b367-e096","GHSA-6crx-4g37-7j49","UBUNTU-CVE-2026-27890"],"analysis":{"component_type":"database","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Firebird database","requires_auth":"none","summary":"An unauthenticated attacker can crash the Firebird database server by sending out-of-order authentication segments, causing a segmentation fault.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"firebird","vendor":"firebirdsql"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when processing CNCT_specific_data segments during authentication, the server assumes segments arrive in strictly ascending order. If segments arrive out of order, the Array class's grow() method computes a negative size value, causing a SIGSEGV crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Firebird has Pre-Auth DOS when Processing Out of Order CNCT_specific_data Segments","id":"CVE-2026-27890","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Remote Code Execution (RCE) via Zip Slip in Plugin Upload Mechanism","id":"CVE-2026-27891"},"packages":[],"prev":{"headline":"NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead","id":"CVE-2026-27889"},"products":["firebird"],"published":"2026-04-17","related":[{"cvss_score":10,"headline":"Firebird: Path Traversal + Arbitrary File Write Leads to Remote Code Execution","id":"CVE-2026-40342","kev_date_added":null,"published":"2026-04-17"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2008-0467","kev_date_added":null,"published":"2008-01-29"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2007-4992","kev_date_added":null,"published":"2007-10-11"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2007-5245","kev_date_added":null,"published":"2007-10-06"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2007-5246","kev_date_added":null,"published":"2007-10-06"},{"cvss_score":8.8,"headline":"Code injection in n/a","id":"CVE-2017-6369","kev_date_added":null,"published":"2017-03-24"}],"sources":[{"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-17","vendors":["FirebirdSQL"]},"summary":"An unauthenticated attacker can crash the Firebird database server by sending out-of-order authentication segments, causing a segmentation fault.","url":"https://insights.sbomify.com/CVE-2026-27890/"}