Unauthenticated SQL Injection in User Information Endpoint

An unauthenticated remote attacker can exploit an unauthenticated SQL Injection vulnerability in the userinfo endpoint due to improper neutralization of special elements in a SQL SELECT command. This can result in a total loss of confidentiality.

Casky was already ahead

This CVE exploits attack patterns that Casky's 301matched 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

CVE-2026-40810 represents a critical authentication bypass vulnerability where attackers can inject arbitrary SQL commands into the userinfo endpoint without requiring credentials. The vulnerability stems from improper neutralization of special characters in SQL SELECT statements (CWE-89), allowing complete database exfiltration. This affects any organization exposing this endpoint, particularly those managing sensitive user data, authentication systems, or customer information repositories. The high CVSS score of 7.5 reflects the severe confidentiality impact—attackers can extract entire databases including credentials, personal information, and application secrets without detection or access restrictions.

Casky's 301 mapped skills leverage Claude's extended reasoning to correlate this vulnerability across MITRE ATT&CK initial access (TA0001) and exfiltration (TA0043) techniques. Practitioners using Casky would identify attack patterns including reconnaissance of the userinfo endpoint, followed by SQL injection payload crafting and delivery. The platform's skill set would surface detection opportunities at multiple stages: anomalous SQL syntax in application logs, unusual database query volumes, and data access patterns deviating from baseline user behavior. Security teams would see findings highlighting the progression from unauthenticated reconnaissance through SQL injection execution to bulk data exfiltration, enabling them to build detection rules, implement input validation controls, and prioritize patching across their infrastructure.

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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 →

301 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-40810.

analyzing-apt-group-with-mitre-navigator

threat intelligence · low

Run

analyzing-campaign-attribution-evidence

threat intelligence · low

Run

analyzing-certificate-transparency-for-phishing

threat intelligence · low

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-40810

Casky has 301 skills that investigate the attack patterns behind CVE-2026-40810. Run one and get CVSS-scored findings in 3 minutes.

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