Exploited vulnerabilities / CVE-2026-45321
Confirmed exploited · exploited vulnerability · TanStackCVE-2026-45321
TanStack exploited vulnerability, confirmed exploited in the wild.
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's name for it | TanStack Unspecified Vulnerability |
|---|---|
| Vendor and product | TanStack · TanStack |
| Type | exploited vulnerability · not stated |
| Exploited | Confirmed by CISA listed 27 May 2026 |
| Likelihood | more likely to be exploited than most |
| Deadline | 10 June 2026 · already passed |
| Used in ransomware | Yes: CISA reports it used in ransomware campaigns |
| Advisories | github.com ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited.
If you cannot patch now, restrict network access to the affected product.
Check for signs of compromise since the date it was added to the list.
| CISA's required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
|---|
Know before someone else finds it
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CVE-2026-45321 in short
Is CVE-2026-45321 being exploited?
Yes. CISA added CVE-2026-45321 to its Known Exploited Vulnerabilities catalogue on 27 May 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-45321?
US federal agencies must remediate it by 10 June 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-45321 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 3.3%, the 88th percentile of every CVE it scores.
How do I fix CVE-2026-45321?
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited. If you cannot patch now, restrict network access to the affected product. Check for signs of compromise since the date it was added to the list.
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.