SurrealDB Arbitrary File Read via DEFINE ANALYZER

SurrealDB before 3.1.5 contains an arbitrary file read vulnerability in the DEFINE ANALYZER mapper filter that allows database users with EDITOR or OWNER roles to read files accessible to the SurrealDB process. Attackers can specify arbitrary file paths in the mapper filter and retrieve file contents through query error messages when the SURREAL_FILE_ALLOWLIST is empty or not configured.

Casky was already ahead

This CVE exploits attack patterns that Casky's 351matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

SurrealDB versions before 3.1.5 suffer from an arbitrary file read vulnerability in the DEFINE ANALYZER mapper filter component. Database users with EDITOR or OWNER roles can exploit this weakness to read any files accessible to the SurrealDB process by specifying malicious file paths in the mapper filter. When the SURREAL_FILE_ALLOWLIST is empty or unconfigured—a common default state—the vulnerability becomes particularly dangerous. File contents are leaked through query error messages, making this a straightforward attack requiring only valid database credentials. This impacts organizations running vulnerable SurrealDB instances where privileged users may be compromised or untrusted, and where sensitive configuration files, application secrets, or system data reside on the same host.

Casky's 351 mapped skills leverage Claude's extended reasoning to detect the attack patterns underlying this CVE across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0007 (Discovery). Practitioners using Casky would identify reconnaissance activities where attackers probe DEFINE ANALYZER syntax and error responses to map readable files (Discovery tactics), followed by exploitation attempts that systematically extract sensitive data like database credentials or API keys from /etc/passwd, environment configs, or application source files. The platform's skill set would flag suspicious DEFINE ANALYZER queries with path traversal indicators (../, absolute paths), unusual error message exfiltration patterns, and privilege escalation chains where EDITOR role compromise leads to unauthorized file access—enabling detection before attackers move laterally or escalate within the environment.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

351 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-63739.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0007

Investigate the attack patterns behind CVE-2026-63739

Casky has 351 skills that investigate the attack patterns behind CVE-2026-63739. Run one and get CVSS-scored findings in 3 minutes.

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