TanStack Unspecified Vulnerability (CVE-2026-45321)
Severity: critical · Patch status: unknown · Since 2026-05-27 · CVE-2026-45321
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. CISA added CVE-2026-45321 to its Known Exploited Vulnerabilities catalog on May 27, 2026, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Jun 10, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
