ArcadeDB MongoDB Protocol Authentication Bypass

ArcadeDB versions before 26.8.1 fail to enforce SASL authentication on data commands in the MongoDB wire-protocol plugin. Unauthenticated attackers can issue insert, find, update, delete, and create commands against any database by connecting to port 27017 without credentials.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched 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

ArcadeDB versions before 26.8.1 contain a critical authentication enforcement flaw in their MongoDB wire-protocol implementation. The vulnerability allows unauthenticated attackers to connect directly to port 27017 and execute privileged database commands—including insert, find, update, delete, and create operations—without providing any credentials. This affects organizations running vulnerable ArcadeDB instances that expose the MongoDB compatibility layer, effectively bypassing all authentication controls and granting complete database access to any network-capable attacker. The CVSS 9.8 rating reflects the severity: complete loss of confidentiality, integrity, and availability with no authentication barrier.

Casky's 283 mapped skills detect the attack patterns underlying this vulnerability by correlating MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access) with Claude's extended reasoning across security domains. Practitioners using Casky would identify suspicious patterns including: unauthenticated MongoDB wire-protocol connections to port 27017, database commands executed without SASL credential presentation, and lateral movement attempts following initial unauthenticated access. The platform's skill-mapping would flag anomalous database activity logs showing create/insert/update/delete operations originating from unexpected sources without corresponding authentication events—a hallmark indicator of this authentication bypass. Security teams would see findings highlighting the absence of expected SASL negotiation frames in protocol analysis, enabling them to distinguish this specific vulnerability from other MongoDB attack vectors and prioritize remediation of ArcadeDB deployments to version 26.8.1 or later.

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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 →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-75852.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

cryptography · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-75852

Casky has 283 skills that investigate the attack patterns behind CVE-2026-75852. Run one and get CVSS-scored findings in 3 minutes.

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