CVE-2026-54496

{"id": "CVE-2026-54496", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54496", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-17T17:23:34.445671Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.3, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.7, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "ZcashFoundation", "product": "zebra", "versions": [{"status": "affected", "version": "< 5.0.0"}]}, {"vendor": "zcash", "product": "halo2_gadgets", "versions": [{"status": "affected", "version": "< 0.5.0"}]}, {"vendor": "zcash", "product": "orchard", "versions": [{"status": "affected", "version": "< 0.14.0"}]}, {"vendor": "zcash", "product": "librustzcash", "versions": [{"status": "affected", "version": "< 0.28.0"}]}, {"vendor": "zcash", "product": "zcash", "versions": [{"status": "affected", "version": "< 6.20.0"}]}]}], "published": "2026-07-17T17:17:16.620", "references": [{"url": "https://github.com/ZcashFoundation/zebra/releases/tag/v5.0.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-ww9q-8r59-xv46", "source": "security-advisories@github.com"}, {"url": "https://github.com/zcash/halo2/releases/tag/halo2_gadgets-0.5.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/zcash/librustzcash/releases/tag/zcash_primitives-0.28.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/zcash/orchard/releases/tag/0.14.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/zcash/zcash/releases/tag/v6.20.0", "source": "security-advisories@github.com"}, {"url": "https://zfnd.org/zebra-4-5-3-and-5-0-0-emergency-soft-fork-and-nu6-2-activation", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-345"}]}], "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."}], "lastModified": "2026-07-17T18:45:20.713", "sourceIdentifier": "security-advisories@github.com"}