{"answers":{"affected":"5 open source packages ship an affected version, including org.hyperledger.fabric-sdk-java:fabric-sdk-java, hyperledger-fabric-orderer and hyperledger-fabric-peer. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41586 exists.","fix":"No fix published yet.","what":"CVE-2026-41586 is a critical unsafe deserialization vulnerability in hyperledger fabric, published on 7 May 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-2026-41586 and fix it if it is affected.\n\nWhat it is: CVE-2026-41586 is a critical unsafe deserialization vulnerability in hyperledger fabric, published on 7 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41586 exists.\n\nAffected packages and fixed versions:\n- org.hyperledger.fabric-sdk-java:fabric-sdk-java (Maven): affected from 1.0.0 up to 2.2.26; no fix listed\n- org.hyperledger.fabric-sdk-java:fabric-sdk-java (Maven): affected from 1.0.0 up to 2.2.26; no fix listed\n- hyperledger-fabric-orderer (Bitnami): affected from 1.0.0; fixed in 2.5.9\n- hyperledger-fabric-peer (Bitnami): affected from 1.0.0; fixed in 2.5.9\n- hyperledger-fabric-tools (Bitnami): affected from 1.0.0; fixed in 2.5.9\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-2026-41586/ (Markdown: https://insights.sbomify.com/CVE-2026-41586/index.md)","id":"CVE-2026-41586","markdown":"https://insights.sbomify.com/CVE-2026-41586/index.md","name":"CVE-2026-41586","record":{"aliases":["BIT-hyperledger-fabric-orderer-2026-41586","BIT-hyperledger-fabric-peer-2026-41586","BIT-hyperledger-fabric-tools-2026-41586","GHSA-prf8-cf2x-rhx7"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Hyperledger Fabric SDK","requires_auth":"none","summary":"Attackers can execute arbitrary code via unsafe Java deserialization in the Hyperledger Fabric SDK when processing untrusted data.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fabric","vendor":"hyperledger"}],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. From versions 1.0.0 to 2.2.26, Channel.java implements readObject() and exposes deSerializeChannel() which call ObjectInputStream.readObject() on untrusted byte arrays without configuring an ObjectInputFilter. This is a classic Java deserialization RCE pattern. At time of publication, there are no publicly available patches.","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"ObjectInputStream.readObject() without ObjectInputFilter in fabric-sdk-java allows Java deserialization RCE","id":"CVE-2026-41586","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":5,"n_references":2,"next":{"headline":"CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution","id":"CVE-2026-41587"},"packages":[{"ecosystem":"Bitnami","fixed":["2.5.9"],"introduced":["1.0.0"],"last_affected":[],"package":"hyperledger-fabric-orderer","purl":"pkg:bitnami/hyperledger-fabric-orderer","source":"BIT-hyperledger-fabric-orderer-2026-41586"},{"ecosystem":"Bitnami","fixed":["2.5.9"],"introduced":["1.0.0"],"last_affected":[],"package":"hyperledger-fabric-peer","purl":"pkg:bitnami/hyperledger-fabric-peer","source":"BIT-hyperledger-fabric-peer-2026-41586"},{"ecosystem":"Bitnami","fixed":["2.5.9"],"introduced":["1.0.0"],"last_affected":[],"package":"hyperledger-fabric-tools","purl":"pkg:bitnami/hyperledger-fabric-tools","source":"BIT-hyperledger-fabric-tools-2026-41586"},{"ecosystem":"Maven","fixed":[],"introduced":["1.0.0"],"last_affected":["2.2.26"],"package":"org.hyperledger.fabric-sdk-java:fabric-sdk-java","purl":null,"source":"GHSA-prf8-cf2x-rhx7"},{"ecosystem":"Maven","fixed":[],"introduced":["1.0.0"],"last_affected":["2.2.26"],"package":"org.hyperledger.fabric-sdk-java:fabric-sdk-java","purl":"pkg:maven/org.hyperledger.fabric-sdk-java/fabric-sdk-java","source":"GHSA-prf8-cf2x-rhx7"}],"prev":{"headline":"ZEBRA: Denial of Service via Interrupted JSON-RPC Requests from Authenticated Clients","id":"CVE-2026-41585"},"products":["fabric"],"published":"2026-05-07","related":[{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2022-45196","kev_date_added":null,"published":"2022-11-12"},{"cvss_score":7.5,"headline":"Improper Input Validation in fabric hyperledger","id":"CVE-2022-31121","kev_date_added":null,"published":"2022-07-07"},{"cvss_score":7.1,"headline":"Crosslinking transaction attack in hyperledger/fabric","id":"CVE-2023-46132","kev_date_added":null,"published":"2023-11-14"},{"cvss_score":7,"headline":"Remote denial of service in Hyperledger Fabric Gateway","id":"CVE-2022-36023","kev_date_added":null,"published":"2022-08-18"},{"cvss_score":5.3,"headline":"Hyperledger Fabric does not verify request has a timestamp within the expected time window","id":"CVE-2024-45244","kev_date_added":null,"published":"2024-08-25"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-05-07","vendors":["hyperledger"]},"summary":"Attackers can execute arbitrary code via unsafe Java deserialization in the Hyperledger Fabric SDK when processing untrusted data.","url":"https://insights.sbomify.com/CVE-2026-41586/"}