{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-114654 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-114654 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-114654 is a medium-severity vulnerability in MongoDB C# Driver, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-114654 and fix it if it is affected.\n\nWhat it is: CVE-2026-114654 is a medium-severity vulnerability in MongoDB C# Driver, published on 22 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-114654 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-2026-114654/ (Markdown: https://insights.sbomify.com/CVE-2026-114654/index.md)","id":"CVE-2026-114654","markdown":"https://insights.sbomify.com/CVE-2026-114654/index.md","name":"CVE-2026-114654","record":{"aliases":["GHSA-5h2q-6c9r-7x25"],"analysis":null,"analysis_generated_by":null,"assigner":"mongodb","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-681","name":"Incorrect Conversion between Numeric Types"}],"description":"A numeric-type conversion flaw in the BSON handling library of the MongoDB C# Driver allows an out-of-range binary subtype value supplied through untrusted textual input to bypass the library's binary-element integrity checks. When such a value is later encoded, it is narrowed to a smaller wire representation, producing binary elements that misdeclare their type or length. An unauthenticated party able to supply text parsed by an affected application can cause it to emit and persist malformed binary data, which subsequent readers either reject with an error or silently interpret as shorter than the data that was validated.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"BSON output corruption via out-of-range binary subtype bypassing UUID and OldBinary guards","id":"CVE-2026-114654","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"KMS request injection via unsanitized key vault and provider values in libmongocrypt","id":"CVE-2026-114655"},"packages":[],"prev":{"headline":"Silent client-side encryption bypass via unescaped field-name regex in CSFLE schema builder","id":"CVE-2026-114653"},"products":["C# Driver"],"published":"2026-10-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-22","vendors":["MongoDB"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-114654/"}