CVE Enrichment

CVSS
9.6 CRITICAL
EPSS
3.28%
EPSS Percentile
88.44%
CISA KEV
YES — Known Exploited Vulnerability

Description

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.

Technical Details

CVSS Version
3.1
CNA / NVD Source
[email protected]
Published
12-May-2026 08:16
Last Modified
27-Oct-2026 01:10
EPSS Date
2026-11-03
CWE
CWE-506

CVSS Vector

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

CISA KEV Details

Date Added
2026-05-27
Remediation Due
2026-06-10
Known Ransomware Campaign Use
Known
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.
Notes
This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpx ; https://nvd.nist.gov/vuln/detail/CVE-2026-45321

CNA Products / Version Status

Affected Products / Versions

References

Last enrichment sync: 04-Nov-2026 02:22
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

Malware (1)

People (1)

Threat Actors (1)

MITRE ATT&CK (9)

Vendors (6)

Products (5)

Industries (3)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.