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CVE-2026-63743 medium CVSS 6.4

SSRF (Server-Side Request Forgery) in surrealdb (CVE-2026-63743)

Summary

SSRF in surrealdb (CVE-2026-63743). Risk of unauthorized operations or information disclosure. Exploitable via NetTarget. Mitigation: upgrade to 3.1.0 or later.

Original description

The description as published by the source.

SurrealDB offers http::* functions that can access external network endpoints, with the --allow-net and --deny-net capabilities used to restrict the set of network targets that can be reached. An authenticated user of SurrealDB can bypass a port-scoped --deny-net : rule by chaining an HTTP redirect: the initial request goes to an --allow-net-permitted hostname, the response's 3xx Location header points at the denied host:port, and the redirect is followed even though the destination was explicitly denied.

The root cause is in the redirect policy applied to outbound HTTP requests (surrealdb/core/src/fnc/util/http/mod.rs): the NetTarget for the redirect destination is built from url.host_str() alone and url.port() is dropped. The capability matcher (surrealdb/core/src/dbs/capabilities.rs:259-264) refuses to match a port-bearing rule against a port-stripped target (Self::Host(host, Some(port)) => match tgt { _ => false }), so the operator's port-scoped deny rule silently does not fire on the redirect target.

Impact

The impact of this vulnerability is circumvention of the --deny-net capability when the operator has scoped deny rules by port, and the resulting impact on systems external to SurrealDB. The ultimate impact is dependent on the deployment scenario.

For example, if a SurrealDB operator uses --deny-net : to block specific internal services (such as a local Redis at 192.168.1.1:6379 or an unauthenticated cloud metadata service) whil…

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-2026-63743 has been found in surrealdb.
Attackers can target a specific entry point like NetTarget over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.4/10.
What to do: upgrade surrealdb to 3.1.0 or later.
If unsure, ask your IT team or search "surrealdb CVE-2026-63743" on the vendor's site.

CVE-2026-63743 (surrealdb) — CWE-918 / CVSS v3 6.4
Attack vector: remote (network-reachable) / no user interaction
Attack surface: NetTarget
Patched: 3.1.0 — 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.

❓ What is the problem

SSRF (CWE-918) exists in surrealdb. Attackers reach the vulnerable code path via NetTarget.

📍 Affected scope

Check the vendor advisory for the affected versions of surrealdb. Attack surface: NetTarget.

🔥 Severity

Severity: Medium (CVSS 6.4/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 3.1.0.

🛡️ 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 3.1.0

    ステージング環境で 3.1.0 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。

  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":"3.1.0"}]}]
crates.io surrealdb
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}]

References

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