{"cve":"CVE-2026-44500","nvd":{"published":"2026-05-08T15:17:01.777","modified":"2026-10-26T18:10:00.173","status":"Analyzed","description":"ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0, prior to zebra-chain version 7.0.0, and prior to zebra-network version 6.0.0, several inbound deserialization paths in Zebra allocated buffers sized against generic transport or block-size ceilings before the tighter protocol or consensus limits were enforced. An unauthenticated or post-handshake peer could therefore force the node to preallocate and parse for orders of magnitude more data than the protocol intended, across headers messages, equihash solutions in block headers, Sapling spend vectors in V5/V4 transactions, and coinbase script bytes in blocks. This issue has been patched in zebrad version 4.4.0, zebra-chain version 7.0.0, and zebra-network version 6.0.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-770"],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-438q-jx8f-cccv"],"products":["zfnd:zebra-chain","zfnd:zebra-network","zfnd:zebrad"],"source":"nvd","synced_at":"2026-10-26T18:27:13.530666824+00:00"},"epss":{"cve":"CVE-2026-44500","score":0.00362,"percentile":0.2982,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-438q-jx8f-cccv","url":"https://osv.dev/vulnerability/GHSA-438q-jx8f-cccv","summary":"Zebra Vulnerable to Allocation Amplification in Inbound Network Deserializers","modified":"2026-05-13T13:55:12.640633Z","packages":[{"ecosystem":"crates.io","name":"zebra-network","purl":"pkg:cargo/zebra-network","ranges":["<6.0.0"],"fixed":["6.0.0"]},{"ecosystem":"crates.io","name":"zebrad","purl":"pkg:cargo/zebrad","ranges":["<4.4.0"],"fixed":["4.4.0"]},{"ecosystem":"crates.io","name":"zebra-chain","purl":"pkg:cargo/zebra-chain","ranges":["<7.0.0"],"fixed":["7.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}