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CVE-2026-63762 medium CVSS 6.5

Vulnerability in surrealdb (CVE-2026-63762)

Summary

Vulnerability in surrealdb (CVE-2026-63762). Risk of unauthorized operations or information disclosure. Exploitable via rquickjs. Mitigation: upgrade to 3.0.0-beta.3 or later.

Original description

The description as published by the source.

In SurrealDB instances with the scripting capability enabled (--allow-scripting), users with the ability to run arbitrary queries can trigger a server crash due to a memory-safety bug in the underlying JS engine. The SurrealDB instance terminates instantly, requiring a manual restart.

The query consists of using built-in string functions to construct a large string and passing it to the JavaScript runtime for compilation. The exact string size required to trigger the crash varies between SurrealDB versions.

Whilst exploiting the vulnerability requires users to be able to run arbitrary queries, if guest access (--allow-guests), is enabled, then guests can perform this attack.

Impact

Any user able to execute queries on a SurrealDB instance with scripting enabled (--allow-scripting) can cause complete denial of service. The server process terminates immediately without graceful shutdown.

The underlying cause of the vulnerability is a null pointer dereference in the QuickJS-NG v0.8 JavaScript engine, this vulnerability cannot be exploited to execute arbitrary code, or compromise the integrity or confidentiality of data.

Patches

Versions prior to SurrealDB v2.6.1 and v3.0.0-beta.3 are vulnerable.

The patches for SurrealDB v2.6.1 and v3.0.0-beta.3 update the rquickjs dependency from v0.9.0 to v0.11.0, which in turn uses an updated version of QuickJS-NG.

Workarounds

Deny execution of embedded scripting functions through the configuratio…

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-2026-63762 has been found in surrealdb.
Attackers can target a specific entry point like rquickjs over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: upgrade surrealdb to 3.0.0-beta.3 or later.
If unsure, ask your IT team or search "surrealdb CVE-2026-63762" on the vendor's site.

CVE-2026-63762 (surrealdb) — CWE-476 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: rquickjs / guest / record / system
Patched: 3.0.0-beta.3 — 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-476) exists in surrealdb. Attackers reach the vulnerable code path via rquickjs.

📍 Affected scope

Check the vendor advisory for the affected versions of surrealdb. Attack surface: rquickjs / guest / record / system.

🔥 Severity

Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 3.0.0-beta.3.

🛡️ 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 3.0.0-beta.3

    ステージング環境で 3.0.0-beta.3 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

crates.io surrealdb
[{"type":"SEMVER","events":[{"introduced":"3.0.0-alpha.8"},{"fixed":"3.0.0-beta.3"}]}]

References

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