CVE entry · CVE-2026-45321
CVE-2026-45321: TanStack Unspecified Vulnerability
TanStack contains an unspecified vulnerability that allowed malicious versions of the product to be published to the npm registry to publish credential-stealing malware under a trusted identity.
- Actively exploited: added to CISA’s KEV catalog on May 27, 2026.
- Used by ransomware, according to CISA.
- Remediation deadline for US federal agencies: June 10, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes TanStack, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.