CVE-20XX-?

CVE-2026-45321

9.6 CRITICAL 3% exploit odds exploited in the wild Fix listed Other Library

What it is

On 2026-05-11, between approximately 19:20 and 19:26 UTC, 84 malicious versions across 42 @tanstack/* packages were published to the npm registry. The publishes were authenticated via the legitimate GitHub Actions OIDC trusted-publisher binding for TanStack/router, but the publish workflow itself was not modified. The attacker chained three known vulnerability classes — a pull_request_target "Pwn Request" misconfiguration, GitHub Actions cache poisoning across the fork↔base trust boundary, and runtime memory extraction of the OIDC token from the Actions runner process — to publish credential-stealing malware under a trusted identity. Each affected package received exactly two malicious versions, published a few minutes apart.

At a glance

Exploitability
Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
In the wild
CISA lists this as exploited in real attacks. Treat as urgent.
Fix
A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

  1. ReservedThe CVE id was reserved by its CNA
  2. PublishedDisclosed publicly on CVE.org and NVD
  3. 2026-05-27 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
  4. 2026-06-10 Remediation deadlineCISA's due date for federal agencies to fix it
  5. Last updatedMost recent change to the record

Details

Published
Last modified
Added to CISA KEV
2026-05-27
Exploit probability
3.3% · EPSS, next 30 days
Weakness
CWE-506
Record status
Analyzed

Affected

Attack profile CVSS 3.1 · 9.6

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Meme: I wake up, CVE-2026-45321
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Fix and advisories

References

NVD record · CVE.org record