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CVE-2025-71390 high CVSS 8.8

Vulnerability in surrealdb (CVE-2025-71390)

Summary

Vulnerability in surrealdb (CVE-2025-71390). Successful exploitation can lead to full system takeover. Exploitable via SURREAL_CAPS_ALLOW_NET. Mitigation: upgrade to 2.3.6 or later.

Original description

The description as published by the source.

SurrealDB offers http functions that can access external network endpoints. A typical, albeit not recommended configuration would be to start SurrealDB with all network connections allowed with the exception of a deny list. For example, surreal start --allow-net --deny-net 10.0.0.0/8 will allow all network connections except to the 10.0.0.0/8 block.

An authenticated user of SurrealDB can use bypass this restriction, using http::() functions where the hostname resolves to an IP within the --deny-net block. For example if a SurrealDB administrator wanted to restrict access to other services within a private network and thus set the --deny-net to a network IP range, this could be circumvented by an attacker leveraging DNS records and hostname resolution.

When sending SurrealDB statements containing the http::* functions, if the hostname resolves to a forbidden IP, the SurrealDB server will still issue the request and return the responses to the attacker.

Impact

The impact of this vulnerability is circumvention of the --deny-net capability and resulting impact on systems external to SurrealDB. The ultimate impact is dependent on the deployment scenario.

For example, if the SurrealDB server blocks requests to internal/private IP addresses because those services don’t require authentication, but an attacker can still use SurrealDBs…

Source: NIST National Vulnerability Database 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-2025-71390 has been found in surrealdb.
Attackers can target a specific entry point like SURREAL_CAPS_ALLOW_NET over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: upgrade surrealdb to 2.3.6 or later.
If unsure, ask your IT team or search "surrealdb CVE-2025-71390" on the vendor's site.

CVE-2025-71390 (surrealdb) — CWE-923 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Attack surface: SURREAL_CAPS_ALLOW_NET / SURREAL_CAPS_DENY_NET
Patched: 2.3.6 — 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.

❓ What is the problem

A vulnerability (CWE-923) exists in surrealdb. Attackers reach the vulnerable code path via SURREAL_CAPS_ALLOW_NET.

📍 Affected scope

Check the vendor advisory for the affected versions of surrealdb. Attack surface: SURREAL_CAPS_ALLOW_NET / SURREAL_CAPS_DENY_NET.

🔥 Severity

Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 2.3.6.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'surrealdb' . 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 'surrealdb' . | 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 surrealdb 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 patch patch 
    Upgrade surrealdb to 2.3.6

    ステージング環境で 2.3.6 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。

  3. 3
    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 surrealdb
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.6"}]}]

References

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