Vulnerability · Published Aug 18, 2026 · Assigned by VulnCheck

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

High 8.6

In plain English

A high-severity server-side request forgery in CodeWhale from Hmbown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.5%top 57.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	codewhale	0.8.64	GHSA-6v2g-fpxh-pmmh
npm	deepseek-tui	0.8.41	GHSA-6v2g-fpxh-pmmh

Affected products (as reported)

Vendor	Product	Versions
Hmbown	CodeWhale	0.8.5 – before 0.8.41
Hmbown	CodeWhale	0.8.5 – before 0.8.41
Hmbown	CodeWhale	0.8.41 – before 0.8.64
Hmbown	CodeWhale	0.8.41 – before 0.8.64

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-6v2g-fpxh-pmmh) vendor-advisory
Patch Commit patch
VulnCheck Advisory: CodeWhale before 0.8.64 SSRF Bypass via DNS Pinning TOCTOU third-party-advisory