{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-54496",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-15T18:01:15.511Z",
        "datePublished": "2026-07-17T16:59:06.809Z",
        "dateUpdated": "2026-07-17T17:23:50.731Z"
    },
    "containers": {
        "cna": {
            "title": "Missing copy constraint in halo2_gadgets variable-base scalar multiplication allows under-constrained base, breaking Orchard Action circuit soundness",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-345",
                            "lang": "en",
                            "description": "CWE-345: Insufficient Verification of Data Authenticity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-ww9q-8r59-xv46",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-ww9q-8r59-xv46"
                },
                {
                    "name": "https://github.com/ZcashFoundation/zebra/releases/tag/v5.0.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ZcashFoundation/zebra/releases/tag/v5.0.0"
                },
                {
                    "name": "https://github.com/zcash/halo2/releases/tag/halo2_gadgets-0.5.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zcash/halo2/releases/tag/halo2_gadgets-0.5.0"
                },
                {
                    "name": "https://github.com/zcash/librustzcash/releases/tag/zcash_primitives-0.28.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zcash/librustzcash/releases/tag/zcash_primitives-0.28.0"
                },
                {
                    "name": "https://github.com/zcash/orchard/releases/tag/0.14.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zcash/orchard/releases/tag/0.14.0"
                },
                {
                    "name": "https://github.com/zcash/zcash/releases/tag/v6.20.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zcash/zcash/releases/tag/v6.20.0"
                },
                {
                    "name": "https://zfnd.org/zebra-4-5-3-and-5-0-0-emergency-soft-fork-and-nu6-2-activation",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://zfnd.org/zebra-4-5-3-and-5-0-0-emergency-soft-fork-and-nu6-2-activation"
                }
            ],
            "affected": [
                {
                    "vendor": "ZcashFoundation",
                    "product": "zebra",
                    "versions": [
                        {
                            "version": "< 5.0.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "zcash",
                    "product": "halo2_gadgets",
                    "versions": [
                        {
                            "version": "< 0.5.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "zcash",
                    "product": "orchard",
                    "versions": [
                        {
                            "version": "< 0.14.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "zcash",
                    "product": "librustzcash",
                    "versions": [
                        {
                            "version": "< 0.28.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "zcash",
                    "product": "zcash",
                    "versions": [
                        {
                            "version": "< 6.20.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-17T16:59:06.809Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0, the variable-base scalar multiplication gadget in halo2_gadgets/src/ecc/chip/mul/incomplete.rs used assign_advice() for the base point without a copy constraint tying it to the actual base, allowing a malicious prover to produce a valid proof for an Orchard Action with an under-constrained base point and bypass the diversified-address-integrity check that binds pk_d, g_d, ivk, the nullifier (nf), and the spend validating key (ak) to the note being spent. This issue is fixed in zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0."
                }
            ],
            "source": {
                "advisory": "GHSA-ww9q-8r59-xv46",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-17T17:23:34.445671Z",
                                "id": "CVE-2026-54496",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-17T17:23:50.731Z"
                }
            }
        ]
    }
}