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CVE-2026-52738

Vulnerability in zebra-state (CVE-2026-52738)

Summary

Vulnerability in zebra-state (CVE-2026-52738). Risk of unauthorized operations or information disclosure. Exploitable via zebrad. Mitigation: upgrade to 7.0.0 or later.

Original description

The description as published by the source.

Am I affected

You are affected if:

  1. You run zebrad up to and including v4.4.1.
  2. Your node processes blocks on any Zcash network.

Summary

The finalized transparent address balance writer processes all newly-created outputs (credits) before processing spent outputs (debits) within the same block. A consensus-valid block containing a long chain of same-address transparent self-spends can cause the intermediate per-address balance during the credit pass to exceed MAX_MONEY, triggering a panic in the finalized state writer.

Because the triggering block is consensus-valid (zcashd accepts it), the panic recurs on restart when the node re-encounters the same block. This creates a persistent chain halt that can only be resolved by a software patch.

Details

The finalized state writer at zebra-state/src/service/finalized_state/zebra_db/transparent.rs iterates all transaction outputs in a block and credits them to per-address balances before iterating inputs and debiting spent outputs. When a block contains many transparent self-spends to the same address, the intermediate credit-only balance can exceed the MAX_MONEY supply cap even though the final net balance (credits minus debits) is valid.

The code panics on the intermediate overflow via .expect() on the balance addition. Under Zebra's panic = "abort" release profile, this terminates the process. On restart, the node re-downloads and re-processes the same consensus-valid block, triggering the sam…

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-2026-52738 has been found in zebra-state.
Attackers can target a specific entry point like zebrad over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade zebra-state to 7.0.0 or later.
If unsure, ask your IT team or search "zebra-state CVE-2026-52738" on the vendor's site.

CVE-2026-52738 (zebra-state) — CWE-248
Attack surface: zebrad / MAX_MONEY
Patched: 7.0.0 — apply immediately
Workaround: No workaround is available.
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.

❓ What is the problem

A vulnerability (CWE-248) exists in zebra-state. Attackers reach the vulnerable code path via zebrad.

📍 Affected scope

Check the vendor advisory for the affected versions of zebra-state. Attack surface: zebrad / MAX_MONEY.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 7.0.0.

🛡️ Workaround

Workaround: No workaround is available.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'zebra-state' . 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

  1. 1
    Identify exposure identify 
    grep -r 'zebra-state' . | 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 zebra-state を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply temporary workaround mitigate 
    No workaround is available.

    パッチが適用されるまでの応急処置として、No workaround is available. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 3
    Apply patch patch 
    Upgrade zebra-state to 7.0.0

    ステージング環境で 7.0.0 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。

  4. 4
    Post-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

rust zebra-state
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0"}]}]
rust zebrad
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.0"}]}]
crates.io zebra-state
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.0.0"}]}]
crates.io zebrad
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.5.0"}]}]

References

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