{"answers":{"affected":"4 open source packages ship an affected version, including zebra-consensus and zebrad. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-34377 in the wild and no public exploit code.","fix":"Upgrade zebra-consensus to 5.0.1 or later.","what":"CVE-2026-34377 is a high-severity vulnerability in ZcashFoundation zebra, published on 31 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34377 and fix it if it is affected.\n\nWhat it is: CVE-2026-34377 is a high-severity vulnerability in ZcashFoundation zebra, published on 31 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-34377 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- zebra-consensus (crates.io): affected all versions; fixed in 5.0.1\n- zebra-consensus (crates.io): affected all versions; fixed in 5.0.1\n- zebrad (crates.io): affected all versions; fixed in 4.3.0\n- zebrad (crates.io): affected all versions; fixed in 4.3.0\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-2026-34377/ (Markdown: https://insights.sbomify.com/CVE-2026-34377/index.md)","id":"CVE-2026-34377","markdown":"https://insights.sbomify.com/CVE-2026-34377/index.md","name":"CVE-2026-34377","record":{"aliases":["GHSA-3vmh-33xr-9cqh"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Zcash node software","requires_auth":"high_privilege","summary":"A malicious miner can cause a consensus split in Zebra nodes by exploiting a transaction verification cache logic error, disrupting network agreement.","user_interaction":"not_required","vuln_class":"business_logic"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"zebra","vendor":"zfnd"},{"product":"zebra-consensus","vendor":"zfnd"}],"cvss":{"score":8.4,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.","ecosystems":["crates.io"],"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":"Zebra has a Consensus Failure due to Improper Verification of V5 Transactions","id":"CVE-2026-34377","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"business_logic","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x","id":"CVE-2026-34378"},"packages":[{"ecosystem":"crates.io","fixed":["5.0.1"],"introduced":["0"],"last_affected":[],"package":"zebra-consensus","purl":null,"source":"GHSA-3vmh-33xr-9cqh"},{"ecosystem":"crates.io","fixed":["5.0.1"],"introduced":["0"],"last_affected":[],"package":"zebra-consensus","purl":"pkg:cargo/zebra-consensus","source":"GHSA-3vmh-33xr-9cqh"},{"ecosystem":"crates.io","fixed":["4.3.0"],"introduced":["0"],"last_affected":[],"package":"zebrad","purl":null,"source":"GHSA-3vmh-33xr-9cqh"},{"ecosystem":"crates.io","fixed":["4.3.0"],"introduced":["0"],"last_affected":[],"package":"zebrad","purl":"pkg:cargo/zebrad","source":"GHSA-3vmh-33xr-9cqh"}],"prev":{"headline":"PdfDing: Password-protected share bypass via direct serve endpoint","id":"CVE-2026-34376"},"products":["zebra","zebra-consensus"],"published":"2026-03-31","related":[{"cvss_score":9.2,"headline":"Zebra node crash — V5 transaction hash panic (P2P reachable)","id":"CVE-2026-34202","kev_date_added":null,"published":"2026-03-31"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-31","vendors":["ZcashFoundation"]},"summary":"A malicious miner can cause a consensus split in Zebra nodes by exploiting a transaction verification cache logic error, disrupting network agreement.","url":"https://insights.sbomify.com/CVE-2026-34377/"}