CVE-2026-75856
Received Received - Intake

CodeWhale SSRF Bypass via DNS Pinning Logic Flaw

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: VulnCheck

Description
CodeWhale before 0.8.64 contains a server-side request forgery bypass vulnerability in DNS pinning logic that fails to prevent time-of-check-time-of-use attacks. Attackers can manipulate DNS responses to fail initial resolution checks and succeed on secondary requests, allowing requests to internal IP addresses and bypassing SSRF mitigations.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-09-07
AI Q&A
2026-08-18
EPSS Evaluated
2026-09-06
NVD
CVE-2026-75856
EUVD
EUVD-2026-60963

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
codewhale codewhale to 0.8.64 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CodeWhale before 0.8.64 has a server-side request forgery (SSRF) bypass vulnerability due to a time-of-check-time-of-use (TOCTOU) flaw in DNS pinning logic. Attackers manipulate DNS responses to fail initial checks but succeed later, allowing requests to internal IP addresses and bypassing SSRF protections.

Detection Guidance

To detect this vulnerability, monitor DNS resolution behavior for inconsistencies in hostname preflight checks. Check if CodeWhale versions before 0.8.64 fail to reject unresolved hostnames or allow secondary DNS resolutions to internal IPs. Inspect network logs for requests to internal IP addresses after initial DNS failures.

Impact Analysis

This vulnerability allows attackers to send unauthorized requests to internal services, private networks, or cloud credentials, potentially leading to data breaches, unauthorized access, or further exploitation of internal systems.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements under GDPR (data protection) and HIPAA (health information privacy). Organizations may face legal penalties, reputational damage, and loss of trust due to non-compliance.

Mitigation Strategies

Upgrade CodeWhale to version 0.8.64 or later immediately. Ensure DNS pinning logic enforces strict hostname resolution checks before any requests. Block requests to internal IP ranges and monitor for suspicious DNS resolution patterns.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-75856. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart