{"answers":{"affected":"4 open source packages ship an affected version, including protobufjs. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-59877 in the wild and no public exploit code.","fix":"Upgrade protobufjs to a fixed version for your release line: 7.6.5 or 8.6.6.","what":"CVE-2026-59877 is a medium-severity denial of service vulnerability in protobufjs protobuf.js, published on 8 Jul 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-2026-59877 and fix it if it is affected.\n\nWhat it is: CVE-2026-59877 is a medium-severity denial of service vulnerability in protobufjs protobuf.js, published on 8 Jul 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-2026-59877 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- protobufjs (npm): affected from 7.5.0; fixed in 7.6.5\n- protobufjs (npm): affected from 7.5.0; fixed in 7.6.5\n- protobufjs (npm): affected from 8.0.0; fixed in 8.6.6\n- protobufjs (npm): affected from 8.0.0; fixed in 8.6.6\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-2026-59877/ (Markdown: https://insights.sbomify.com/CVE-2026-59877/index.md)","id":"CVE-2026-59877","markdown":"https://insights.sbomify.com/CVE-2026-59877/index.md","name":"CVE-2026-59877","record":{"aliases":["CLEANSTART-2026-PW61027","CLEANSTART-2026-SF05781","CLSA-2026-1792476163","ECHO-9438-ca8d-8130","GHSA-j3f2-48v5-ccww","MINI-6x8j-4p58-28f4","MINI-8547-9cp5-2x8f","MINI-9fc8-hm7w-9rwf","MINI-9q4f-fmcj-4vvf","MINI-fmmr-mfmc-5r85","MINI-frq7-69vq-r7h6","MINI-hx28-f59m-q9c8","MINI-hx65-h47g-wrq5","MINI-jgj4-q24r-993f","MINI-m72j-cv75-8cvp","ROOT-APP-NPM-CVE-2026-59877"],"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":"An attacker can cause a denial of service via an infinite loop in protobufjs by providing a crafted .proto schema that triggers premature termination during option parsing.","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-835","name":"Loop with Unreachable Exit Condition"}],"description":"protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.","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: Denial of Service via infinite loop in .proto option parsing","id":"CVE-2026-59877","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":6,"next":{"headline":"Denial of service in Apache ActiveMQ","id":"CVE-2026-59878"},"packages":[{"ecosystem":"npm","fixed":["7.6.5"],"introduced":["7.5.0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-j3f2-48v5-ccww"},{"ecosystem":"npm","fixed":["7.6.5"],"introduced":["7.5.0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-j3f2-48v5-ccww"},{"ecosystem":"npm","fixed":["8.6.6"],"introduced":["8.0.0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-j3f2-48v5-ccww"},{"ecosystem":"npm","fixed":["8.6.6"],"introduced":["8.0.0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-j3f2-48v5-ccww"}],"prev":{"headline":"protobufjs: Text Format string map parsing can mutate returned map object prototype","id":"CVE-2026-59876"},"products":["protobuf.js"],"published":"2026-07-08","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":"2026-07-08","vendors":["protobufjs"]},"summary":"An attacker can cause a denial of service via an infinite loop in protobufjs by providing a crafted .proto schema that triggers premature termination during option parsing.","url":"https://insights.sbomify.com/CVE-2026-59877/"}