{"answers":{"affected":"8 open source packages ship an affected version, including protobufjs and protobufjs-cli. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-54269 in the wild and no public exploit code.","fix":"Upgrade protobufjs to a fixed version for your release line: 7.6.3 or 8.6.0.","what":"CVE-2026-54269 is a medium-severity 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-2026-54269 and fix it if it is affected.\n\nWhat it is: CVE-2026-54269 is a medium-severity 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-2026-54269 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- protobufjs (npm): affected all versions; fixed in 7.6.3\n- protobufjs (npm): affected all versions; fixed in 7.6.3\n- protobufjs (npm): affected from 8.0.0; fixed in 8.6.0\n- protobufjs (npm): affected from 8.0.0; fixed in 8.6.0\n- protobufjs-cli (npm): affected all versions; fixed in 1.3.3\n- protobufjs-cli (npm): affected all versions; fixed in 1.3.3\n- protobufjs-cli (npm): affected from 2.0.0; fixed in 2.5.1\n- protobufjs-cli (npm): affected from 2.0.0; fixed in 2.5.1\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-2026-54269/ (Markdown: https://insights.sbomify.com/CVE-2026-54269/index.md)","id":"CVE-2026-54269","markdown":"https://insights.sbomify.com/CVE-2026-54269/index.md","name":"CVE-2026-54269","record":{"aliases":["CLEANSTART-2026-UJ56320","CLEANSTART-2026-XE88447","CLSA-2026-1787930264","CLSA-2026-1793268960","ECHO-70eb-f73a-a7f7","GHSA-f38q-mgvj-vph7","MINI-4r4x-g38c-v2p8","MINI-52xh-wrwp-8r63","MINI-6x3w-8cx7-v7rp","MINI-78f7-p88h-9g2w","MINI-99vp-8rpp-87h9","MINI-cx78-pjvg-2c59","MINI-f3cp-56qj-8xh9","MINI-ffvj-x865-hjh4","MINI-g3gc-jp59-4pmf","MINI-mfhv-gwgw-78pm","MINI-q336-qqgh-vh23","MINI-r6f4-4q2h-37cc","MINI-rw4g-28gq-x7hh","MINI-wfg8-3c5g-5wwf","ROOT-APP-NPM-CVE-2026-54269"],"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 denial of service in protobufjs by using schema names that shadow internal runtime properties, leading to exceptions or infinite recursion.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"protobufjs","vendor":"protobufjs_project"},{"product":"protobufjs-cli","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-754","name":"Improper Check for Unusual or Exceptional Conditions"},{"id":"CWE-674","name":"Uncontrolled Recursion"}],"description":"protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 8.6.0 and 7.6.3, protobufjs accepted certain schema-derived names that could collide with properties used by protobufjs runtime helpers. The known affected names are fields named hasOwnProperty, field or oneof names such as $type when loaded through protobufjs JSON/reflection descriptors, and service methods whose generated helper name is rpcCall. When affected message or service types were used, protobufjs could read schema-controlled data where it expected an own-property helper, reflected type metadata, or the base RPC helper. This could cause deterministic exceptions or recursive calls in affected decode post-checks, verification, object conversion, reflected JSON serialization, or protobufjs RPC helper invocation. This vulnerability is fixed in 8.6.0 and 7.6.3.","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: Schema-derived names can shadow runtime-significant properties","id":"CVE-2026-54269","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2026"},"n_packages":8,"n_references":1,"next":{"headline":"protobufjs: Memory amplification from preserved unknown fields in binary decode","id":"CVE-2026-54270"},"packages":[{"ecosystem":"npm","fixed":["7.6.3"],"introduced":["0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["7.6.3"],"introduced":["0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["8.6.0"],"introduced":["8.0.0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["8.6.0"],"introduced":["8.0.0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["1.3.3"],"introduced":["0"],"last_affected":[],"package":"protobufjs-cli","purl":null,"source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["1.3.3"],"introduced":["0"],"last_affected":[],"package":"protobufjs-cli","purl":"pkg:npm/protobufjs-cli","source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["2.5.1"],"introduced":["2.0.0"],"last_affected":[],"package":"protobufjs-cli","purl":null,"source":"GHSA-f38q-mgvj-vph7"},{"ecosystem":"npm","fixed":["2.5.1"],"introduced":["2.0.0"],"last_affected":[],"package":"protobufjs-cli","purl":"pkg:npm/protobufjs-cli","source":"GHSA-f38q-mgvj-vph7"}],"prev":{"headline":"Angular: Denial of Service (DoS) via OOM in Date Formatting (formatDate)","id":"CVE-2026-54268"},"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 denial of service in protobufjs by using schema names that shadow internal runtime properties, leading to exceptions or infinite recursion.","url":"https://insights.sbomify.com/CVE-2026-54269/"}