What’s Vulnerable › Vulnerabilities

CVE-2026-75856: CodeWhale before 0.8.64 SSRF Bypass via DNS Pinning TOCTOU

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-18 · updated 2026-10-22
• Weakness: CWE-918

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.

Affected products

• Hmbown CodeWhale: from 0.8.5 before 0.8.41; from 0.8.41 before 0.8.64 — fixed in 0.8.41, 0.8.64

How to fix

Upgrade to a fixed version: Hmbown CodeWhale 0.8.41, 0.8.64. Check the vendor advisory for mitigations.

References

• https://github.com/Hmbown/CodeWhale/commit/26de44a8bd5051f8f944ea60b2c37ae1d2b7d25e
• https://github.com/Hmbown/CodeWhale/security/advisories/GHSA-6v2g-fpxh-pmmh
• https://www.vulncheck.com/advisories/codewhale-before-ssrf-bypass-via-dns-pinning-toctou
• https://github.com/Hmbown/CodeWhale/security/advisories/GHSA-6v2g-fpxh-pmmh

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