{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-106437 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-106437 is a medium-severity vulnerability in MongoDB C Driver, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-106437 and fix it if it is affected.\n\nWhat it is: CVE-2026-106437 is a medium-severity vulnerability in MongoDB C Driver, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-106437 in the wild and no public exploit code.\n\nAffected product: MongoDB C Driver. 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-2026-106437/ (Markdown: https://insights.sbomify.com/CVE-2026-106437/index.md)","id":"CVE-2026-106437","markdown":"https://insights.sbomify.com/CVE-2026-106437/index.md","name":"CVE-2026-106437","record":{"aliases":["DEBIAN-CVE-2026-106437","UBUNTU-CVE-2026-106437"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"MongoDB C Driver","requires_auth":"none","summary":"An integer underflow in the MongoDB C Driver allows attackers to cause out-of-bounds memory access, leading to crashes or potential code execution.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mongodb","cpe":[{"product":"c_driver","vendor":"mongodb"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to pass an undersized value to bson_reserve_buffer and then perform an affected operation.","ecosystems":[],"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":"Out-of-bounds read and write via undersized BSON buffer reservation in MongoDB C Driver","id":"CVE-2026-106437","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Silent Decimal128 value corruption via incorrect exactness check in MongoDB C Driver","id":"CVE-2026-106438"},"packages":[],"prev":{"headline":"Application denial of service and data truncation via unchecked BSON append failures in MongoDB PHP Driver","id":"CVE-2026-106436"},"products":["C Driver"],"published":"2026-10-08","related":[{"cvss_score":9.2,"headline":"Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream","id":"CVE-2026-93393","kev_date_added":null,"published":"2026-09-17"},{"cvss_score":8.6,"headline":"MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow","id":"CVE-2026-6691","kev_date_added":null,"published":"2026-05-06"},{"cvss_score":8.2,"headline":"Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS client","id":"CVE-2026-84964","kev_date_added":null,"published":"2026-09-03"},{"cvss_score":7.3,"headline":"Accessing Untrusted Directory May Allow Local Privilege Escalation","id":"CVE-2024-7553","kev_date_added":null,"published":"2024-08-07"},{"cvss_score":6.9,"headline":"Integer Underflow → Heap Out-of-Bounds Read in `bson_new_from_buffer()","id":"CVE-2026-93395","kev_date_added":null,"published":"2026-09-17"},{"cvss_score":6.9,"headline":"Bulk write with options may read invalid memory","id":"CVE-2025-12119","kev_date_added":null,"published":"2025-11-18"},{"cvss_score":6.3,"headline":"libmongoc SCRAM client nonce-validation bypass","id":"CVE-2026-93394","kev_date_added":null,"published":"2026-09-17"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["MongoDB"]},"summary":"An integer underflow in the MongoDB C Driver allows attackers to cause out-of-bounds memory access, leading to crashes or potential code execution.","url":"https://insights.sbomify.com/CVE-2026-106437/"}