{"id":"GHSA-c8w6-x74f-vmg3","revision":null,"records":[{"revision":"52fcad053860416a8f3b41ecd5cdb0ea","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104434","aliases":[],"title":"Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC","description":"ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.","state":0,"publishedAt":"2026-10-02T11:38:11.845+00:00","modifiedAt":"2026-10-02T15:30:07.619+00:00","affected":[{"ecosystem":"Vendor product","name":"zebra","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ZcashFoundation\",\n                    \"product\": \"zebra\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:cargo/zebra-rpc\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"8.0.0\"\n                        },\n                        {\n                            \"version\": \"8.0.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"zebra","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ZcashFoundation\",\n                    \"product\": \"zebra\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:cargo/zebrad\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"4.5.0\"\n                        },\n                        {\n                            \"version\": \"4.5.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-c8w6-x74f-vmg3","https://www.vulncheck.com/advisories/zebra-before-8.0.0-denial-of-service-via-z-listunifiedreceivers-rpc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104434","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104434","identifiers":["CVE-2026-104434"]},"retained":false,"historicalAffected":[]},{"revision":"eaf11c799df247cbafb2e108d52b49ed","observedAt":"2026-11-11T05:30:15.035+00:00","statement":{"source":"euvd","id":"EUVD-2026-91444","aliases":["CVE-2026-104434","GHSA-fxgv-g76m-8hg2"],"title":"ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid…","description":"ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":7.1,"severity":null}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-c8w6-x74f-vmg3","https://www.vulncheck.com/advisories/zebra-before-8.0.0-denial-of-service-via-z-listunifiedreceivers-rpc"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-91444","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 2, 2026, 11:38:11 AM","dateUpdated":"Oct 2, 2026, 3:30:07 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-91444","identifiers":["EUVD-2026-91444","CVE-2026-104434","GHSA-fxgv-g76m-8hg2"]},"retained":false,"historicalAffected":[]},{"revision":"69aaaaaa7b9848fc9a08dc9cf8895698","observedAt":"2026-10-25T04:17:29.458+00:00","statement":{"source":"nvd","id":"CVE-2026-104434","aliases":[],"title":"ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid…","description":"ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.","state":0,"publishedAt":"2026-10-02T12:17:13.917+00:00","modifiedAt":"2026-10-02T17:59:09.43+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-c8w6-x74f-vmg3","https://www.vulncheck.com/advisories/zebra-before-8.0.0-denial-of-service-via-z-listunifiedreceivers-rpc"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104434","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-617"],"productCriteria":[],"sourceDates":{"published":"2026-10-02T12:17:13.917","lastModified":"2026-10-02T17:59:09.430"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-104434","identifiers":["CVE-2026-104434"]},"retained":false,"historicalAffected":[]},{"revision":"633fe8a76d2e4b4f9d679a739ee4e348","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-c8w6-x74f-vmg3","aliases":["CVE-2026-104434"],"title":"zebrad vulnerable to full node denial of service via crafted Sapling receiver in z_listunifiedreceivers","description":"### Am I affected\n\nYou are affected if:\n\n1. You run `zebrad` up to and including `v4.4.1`.\n2. Your `zebrad.toml` sets `rpc.listen_addr` to a TCP address (RPC server is enabled).\n3. An attacker can authenticate to the RPC endpoint. With the default `enable_cookie_auth = true`, this requires the attacker to read the `.cookie` file (typically local access). With `enable_cookie_auth = false`, any network client reaching the RPC port can trigger it.\n\n### Summary\n\nThe `z_listunifiedreceivers` RPC handler panics when processing a structurally valid Unified Address whose Sapling receiver carries 43 bytes that fail cryptographic validation (`sapling_crypto::PaymentAddress::from_bytes` returns `None` for non-subgroup Jubjub points). The handler calls `.expect(\"using data already decoded as valid\")` on the fallible result. Because Zebra's release profile sets `panic = \"abort\"`, the panic terminates the entire node process, not just the RPC task.\n\n### Details\n\n`zcash_address::unified::Encoding::decode` validates only the structural envelope of a Unified Address (F4Jumble, bech32m, typecode ordering, 43-byte length for Sapling). It does not validate that the embedded `pk_d` is a valid Jubjub subgroup point or that the diversifier produces a valid `g_d` preimage.\n\nAt `zebra-rpc/src/methods.rs:2893`, the handler calls `Address::try_from_sapling(network, data)`, which delegates to `sapling_crypto::PaymentAddress::from_bytes`. When `from_bytes` returns `None` (most random 32-byte strings fail the subgroup check), the `.expect()` fires and the process aborts.\n\nThe same crate already handles this correctly in `try_from_unified` at `zebra-chain/src/primitives/address.rs:99-110`, which returns `Err` when `from_bytes` fails. The vulnerable code path bypasses this validated route.\n\n### Patches\n\nzebra-rpc 8.0.0 and zebrad 4.5.0.\n\nReplace `.expect()` with `.map_err(|e| ErrorObject::owned(...))` for proper error propagation, or route through the existing `try_from_unified` path which already handles this case correctly.\n\n### Workarounds\n\n- Disable the RPC server by removing `rpc.listen_addr` from `zebrad.toml`.\n- Ensure `enable_cookie_auth = true` (the default) and restrict filesystem access to the `.cookie` file.\n- Place a reverse proxy in front of the RPC port that rejects `z_listunifiedreceivers` calls with untrusted address parameters.\n\n### Impact\n\nA single authenticated RPC request terminates the `zebrad` process. The attack is repeatable on restart (the same request triggers the same abort), allowing an attacker to keep the node down indefinitely until the request is filtered upstream. Operators using `lightwalletd` backends, Zaino indexers, or mining pool infrastructure that forward RPC calls to `zebrad` may be exposed if the forwarding path passes through `z_listunifiedreceivers`.\n\n### Credit\n\nReported by `@robustfengbin` via a private GitHub Security Advisory submission.","state":0,"publishedAt":"2026-07-02T19:37:58+00:00","modifiedAt":"2026-10-03T03:56:05.2764613+00:00","affected":[{"ecosystem":"crates.io","name":"zebra-rpc","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"8.0.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"crates.io","name":"zebrad","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.5.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-c8w6-x74f-vmg3","https://github.com/ZcashFoundation/zebra","https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/Cargo.toml#L305","https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebra-rpc/src/methods.rs#L2867-L2914"],"sourceUrl":"https://github.com/advisories/GHSA-c8w6-x74f-vmg3","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-c8w6-x74f-vmg3","identifiers":["GHSA-c8w6-x74f-vmg3","CVE-2026-104434"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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