- Critical 9.6
- Known exploited (CISA KEV)
- Used in ransomware (CISA)
CVE-2026-45321
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-…
Scores
The facts
- Published
- 12 May 2026
- Last changed
- 17 June 2026
- NVD status
- Analyzed
- Severity
- Critical, CVSS 9.6 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- Affects
- mistral mistralai
- antoinebcx ml-toolkit-ts
- christianalares git-git-git
- christianalares git branch selector
- christianalares nextmove-mcp
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 27 May 2026. CISA lists it as used in ransomware campaigns.
- EPSS
- 1.1% chance of exploitation activity in the next 30 days (percentile 64).
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