Vulnerability in zebrad (CVE-2026-54496)
Summary
Vulnerability in zebrad (CVE-2026-54496). Data can be tampered with by attackers. Exploitable via halo2_gadgets. Mitigation: upgrade to 5.0.0 or later.
Original description
The description as published by the source.
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: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54496 has been found in zebrad.
Attackers can target a specific entry point like halo2_gadgets over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 9.3/10.
What to do: upgrade zebrad to 5.0.0 or later.
If unsure, ask your IT team or search "zebrad CVE-2026-54496" on the vendor's site.
CVE-2026-54496 (zebrad) — CWE-345 / CVSS v3 9.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: halo2_gadgets / q_mul_2 / orchard / zcash_primitives
Patched: 5.0.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-345) exists in zebrad. Attackers reach the vulnerable code path via halo2_gadgets without authentication.
Check the vendor advisory for the affected versions of zebrad. Attack surface: halo2_gadgets / q_mul_2 / orchard / zcash_primitives.
Severity: Critical (CVSS 9.3/10). Data can be tampered with by attackers.
Update to 5.0.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'zebrad' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'zebrad' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
zebradを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade zebrad to 5.0.0ステージング環境で 5.0.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web zfnd.org