{"answers":{"affected":"2 open source packages ship an affected version, including protobufjs. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-54270 in the wild and no public exploit code.","fix":"Upgrade protobufjs to 8.5.0 or later.","what":"CVE-2026-54270 is a medium-severity denial of service vulnerability in protobufjs protobuf.js, published on 22 Jun 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-2026-54270 and fix it if it is affected.\n\nWhat it is: CVE-2026-54270 is a medium-severity denial of service vulnerability in protobufjs protobuf.js, published on 22 Jun 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-2026-54270 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- protobufjs (npm): affected from 8.2.0; fixed in 8.5.0\n- protobufjs (npm): affected from 8.2.0; fixed in 8.5.0\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-2026-54270/ (Markdown: https://insights.sbomify.com/CVE-2026-54270/index.md)","id":"CVE-2026-54270","markdown":"https://insights.sbomify.com/CVE-2026-54270/index.md","name":"CVE-2026-54270","record":{"aliases":["GHSA-94rc-8x27-4472","MINI-623v-wj9h-7mpw","ROOT-APP-NPM-CVE-2026-54270"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript protobuf library","requires_auth":"none","summary":"Attackers can cause memory exhaustion and denial of service by sending crafted protobuf payloads with many unknown fields to applications using vulnerable protobufjs versions.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"protobufjs","vendor":"protobufjs_project"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"protobufjs compiles protobuf definitions into JavaScript (JS) functions. From 8.2.0 to 8.4.2, protobufjs preserved unknown wire elements in message.$unknowns and did not provide a decode-time option to discard unknown fields before retaining them. A crafted protobuf payload containing many unknown fields could therefore cause a decoded message to retain substantially more memory than the input size would suggest, even when unknown-field round-tripping is not needed. protobufjs 8.5.0 added the relevant decode-time options, allowing applications that decode untrusted protobuf data to disable unknown-field retention during decode. protobufjs 8.6.2 flips the default so unknown fields are discarded unless explicitly opted into.","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":"protobufjs: Memory amplification from preserved unknown fields in binary decode","id":"CVE-2026-54270","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"protobufjs-cli: Code injection in pbjs static output from crafted JSON descriptor names","id":"CVE-2026-54271"},"packages":[{"ecosystem":"npm","fixed":["8.5.0"],"introduced":["8.2.0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-94rc-8x27-4472"},{"ecosystem":"npm","fixed":["8.5.0"],"introduced":["8.2.0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-94rc-8x27-4472"}],"prev":{"headline":"protobufjs: Schema-derived names can shadow runtime-significant properties","id":"CVE-2026-54269"},"products":["protobuf.js"],"published":"2026-06-22","related":[{"cvss_score":9.8,"headline":"protobufjs Prototype Pollution vulnerability","id":"CVE-2023-36665","kev_date_added":null,"published":"2023-07-05"},{"cvss_score":9.4,"headline":"protobufjs has an arbitrary code execution issue","id":"CVE-2026-41242","kev_date_added":null,"published":"2026-04-18"},{"cvss_score":8.2,"headline":"Prototype Pollution","id":"CVE-2022-25878","kev_date_added":null,"published":"2022-05-27"},{"cvss_score":8.1,"headline":"protobufjs: Code generation gadget after prototype pollution","id":"CVE-2026-44291","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":7.7,"headline":"protobufjs: Code injection through bytes field defaults in generated toObject code","id":"CVE-2026-44293","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":7.5,"headline":"protobufjs: Denial of service through unbounded Any expansion during JSON conversion","id":"CVE-2026-48712","kev_date_added":null,"published":"2026-06-22"},{"cvss_score":7.5,"headline":"protobufjs: Denial of service through unbounded protobuf recursion","id":"CVE-2026-44289","kev_date_added":null,"published":"2026-05-13"}],"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":"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["protobufjs"]},"summary":"Attackers can cause memory exhaustion and denial of service by sending crafted protobuf payloads with many unknown fields to applications using vulnerable protobufjs versions.","url":"https://insights.sbomify.com/CVE-2026-54270/"}