{"answers":{"affected":"3 open source packages ship an affected version, including github.com/ethereum/go-ethereum. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-26264 in the wild and no public exploit code.","fix":"Upgrade github.com/ethereum/go-ethereum to 1.9.25 or later.","what":"CVE-2020-26264 is a medium-severity denial of service vulnerability in go-ethereum, published on 11 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-26264 and fix it if it is affected.\n\nWhat it is: CVE-2020-26264 is a medium-severity denial of service vulnerability in go-ethereum, published on 11 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-26264 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/ethereum/go-ethereum (Go): affected all versions; fixed in 1.9.25\n- github.com/ethereum/go-ethereum (Go): affected all versions; fixed in 1.9.25\n- github.com/ethereum/go-ethereum (Go): affected all versions; fixed in 1.9.25\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-2020-26264/ (Markdown: https://insights.sbomify.com/CVE-2020-26264/index.md)","id":"CVE-2020-26264","markdown":"https://insights.sbomify.com/CVE-2020-26264/index.md","name":"CVE-2020-26264","record":{"aliases":["GHSA-r33q-22hv-j29q","GO-2021-0063"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Ethereum client","requires_auth":"low_privilege","summary":"A malicious request can crash the Light Ethereum Subprotocol server, requiring users to upgrade or disable the feature.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"go_ethereum","vendor":"ethereum"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25.","ecosystems":["Go"],"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":"LES Server DoS via GetProofsV2","id":"CVE-2020-26264","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":3,"n_references":4,"next":{"headline":"Consensus flaw during block processing","id":"CVE-2020-26265"},"packages":[{"ecosystem":"Go","fixed":["1.9.25"],"introduced":["0"],"last_affected":[],"package":"github.com/ethereum/go-ethereum","purl":null,"source":"GHSA-r33q-22hv-j29q"},{"ecosystem":"Go","fixed":["1.9.25"],"introduced":["0"],"last_affected":[],"package":"github.com/ethereum/go-ethereum","purl":"pkg:golang/github.com/ethereum/go-ethereum","source":"GHSA-r33q-22hv-j29q"},{"ecosystem":"Go","fixed":["1.9.25"],"introduced":["0"],"last_affected":[],"package":"github.com/ethereum/go-ethereum","purl":"pkg:golang/github.com/ethereum/go-ethereum","source":"GO-2021-0063"}],"prev":{"headline":"RSA vulnerability in tslite-ng","id":"CVE-2020-26263"},"products":["go-ethereum"],"published":"2020-12-11","related":[{"cvss_score":8.7,"headline":"Go Ethereum affected by DoS via malicious p2p message","id":"CVE-2026-26314","kev_date_added":null,"published":"2026-02-19"},{"cvss_score":7.5,"headline":"go-ethereum vulnerable to denial of service via crafted GraphQL query","id":"CVE-2023-42319","kev_date_added":null,"published":"2023-10-18"},{"cvss_score":7.5,"headline":"Denial of service via malicious p2p message in go-ethereum","id":"CVE-2023-40591","kev_date_added":null,"published":"2023-09-06"},{"cvss_score":7.5,"headline":"Denial of service in go-ethereum","id":"CVE-2021-42219","kev_date_added":null,"published":"2022-03-16"},{"cvss_score":7.5,"headline":"Denial of Service in Go-Ethereum","id":"CVE-2022-23327","kev_date_added":null,"published":"2022-03-04"},{"cvss_score":7.5,"headline":"Denial of Service in Go-Ethereum","id":"CVE-2022-23328","kev_date_added":null,"published":"2022-03-04"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2018-20421","kev_date_added":null,"published":"2018-12-24"}],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["ethereum"]},"summary":"A malicious request can crash the Light Ethereum Subprotocol server, requiring users to upgrade or disable the feature.","url":"https://insights.sbomify.com/CVE-2020-26264/"}