{"answers":{"affected":"2 open source packages ship an affected version, including msgpack5.","exploited":"There is no known exploitation of CVE-2026-107297 in the wild and no public exploit code.","fix":"Upgrade msgpack5 to 6.1.0 or later.","what":"CVE-2026-107297 is a medium-severity denial of service vulnerability in mcollina msgpack5, published on 8 Oct 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-2026-107297 and fix it if it is affected.\n\nWhat it is: CVE-2026-107297 is a medium-severity denial of service vulnerability in mcollina msgpack5, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-107297 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- msgpack5 (npm): affected all versions; fixed in 6.1.0\n- msgpack5 (npm): affected all versions; fixed in 6.1.0\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-2026-107297/ (Markdown: https://insights.sbomify.com/CVE-2026-107297/index.md)","id":"CVE-2026-107297","markdown":"https://insights.sbomify.com/CVE-2026-107297/index.md","name":"CVE-2026-107297","record":{"aliases":["AZL-106842","GHSA-gcx5-hxj7-gpqq"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js msgpack library","requires_auth":"none","summary":"A remote attacker can cause excessive CPU usage and block the event loop by sending fragmented MessagePack data to the streaming decoder.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder reparses an incomplete array or map from the beginning whenever another chunk arrives. A remote peer can split one valid MessagePack container across many small chunks, causing completed elements to be decoded repeatedly, producing quadratic CPU use and blocking the event loop. This issue is fixed in version 6.1.0.","ecosystems":["npm"],"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":"msgpack5: Quadratic parsing in the streaming decoder","id":"CVE-2026-107297","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"msgpack5: Deeply nested input can exhaust the decoder stack","id":"CVE-2026-107298"},"packages":[{"ecosystem":"npm","fixed":["6.1.0"],"introduced":["0"],"last_affected":[],"package":"msgpack5","purl":null,"source":"GHSA-gcx5-hxj7-gpqq"},{"ecosystem":"npm","fixed":["6.1.0"],"introduced":["0"],"last_affected":[],"package":"msgpack5","purl":"pkg:npm/msgpack5","source":"GHSA-gcx5-hxj7-gpqq"}],"prev":{"headline":"msgpack5: Decoding negative int64 values mutates the input buffer","id":"CVE-2026-107296"},"products":["msgpack5"],"published":"2026-10-08","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":["mcollina"]},"summary":"A remote attacker can cause excessive CPU usage and block the event loop by sending fragmented MessagePack data to the streaming decoder.","url":"https://insights.sbomify.com/CVE-2026-107297/"}