CVE-2026-45321
CriticalExploitedPublic exploitMalware in @tanstack/* packages exfiltrates cloud credentials, GitHub tokens, and SSH keys
Published May 13, 2026 · Updated Oct 14, 2026 · Also known as EUVD-2026-29352, GHSA-g7cv-rxg3-hmpx, TR-26-0225
Key Facts
Patch immediately- CVE-2026-45321 is a critical-severity vulnerability (CVSS 9.6 v3.1) affecting Supersurkhet\/cli (Abhishake1), Supersurkhet\/sdk (Abhishake1), Taskflow-Corp\/cli (Abhishake1) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 27, 2026 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 1.1% probability of exploitation in the next 30 days.
- Fixed versions are available, including @tanstack/arktype-adapter 1.166.16, @tanstack/eslint-plugin-router 1.161.13, @tanstack/eslint-plugin-start 0.0.8.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
1.1%
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-45321 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 27, 2026 | Jun 10, 2026 | Known |
| Industry KEV feed | May 27, 2026 | Jun 10, 2026 | Known |
| CIRCL KEV | May 27, 2026 | Jun 10, 2026 | Not reported |
| ENISA EUVD | May 27, 2026 | n/a | Not reported |
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.
Affected Products
427 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Supersurkhet\/cliAbhishake1 | 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7 | n/a |
| Supersurkhet\/sdkAbhishake1 | 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7 | n/a |
| Taskflow-Corp\/cliAbhishake1 | 0.1.24, 0.1.25, 0.1.26, 0.1.27, 0.1.28, 0.1.29 | n/a |
| Agentwork-CliAgentworkhq | 0.1.4, 0.1.5 | n/a |
| Ml-Toolkit-TsAntoinebcx | 1.0.4, 1.0.5 | n/a |
Patched Releases
@tanstack/arktype-adapter
1.166.16
@tanstack/eslint-plugin-router
1.161.13
@tanstack/eslint-plugin-start
0.0.8
@tanstack/history
1.161.13
@tanstack/nitro-v2-vite-plugin
1.154.16
@tanstack/react-router
1.169.9
@tanstack/react-router-devtools
1.166.20
@tanstack/react-router-ssr-query
1.166.19
@tanstack/react-start
1.167.72
@tanstack/react-start-client
1.166.55
@tanstack/react-start-rsc
0.0.51
@tanstack/react-start-server
1.166.59
@tanstack/router-cli
1.166.50
@tanstack/router-core
1.169.9
@tanstack/router-devtools
1.166.20
@tanstack/router-devtools-core
1.167.10
@tanstack/router-generator
1.166.49
@tanstack/router-plugin
1.167.42
@tanstack/router-ssr-query-core
1.168.7
@tanstack/router-utils
1.161.15
@tanstack/router-vite-plugin
1.166.57
@tanstack/solid-router
1.169.9
@tanstack/solid-router-devtools
1.166.20
@tanstack/solid-router-ssr-query
1.166.19
@tanstack/solid-start
1.167.69
Timeline
Publicly disclosed
May 13, 2026
Added to CISA KEV
May 27, 2026
Added to Industry KEV feed
May 27, 2026
Added to CIRCL KEV
May 27, 2026
Added to ENISA EUVD
May 27, 2026
Last updated
Oct 14, 2026
Weakness Type
- CWE-506 Embedded Malicious Code
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45321.json
- advisoryhttps://github.com/TanStack/router/issues/7383
- advisoryhttps://github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpx
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-45321
FAQ
Common Questions.
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.
Affected: Supersurkhet\/cli (Abhishake1) versions 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7; Supersurkhet\/sdk (Abhishake1) versions 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7; Taskflow-Corp\/cli (Abhishake1) versions 0.1.24, 0.1.25, 0.1.26, 0.1.27, 0.1.28, 0.1.29, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 27, 2026 and is known to be used in ransomware campaigns.
Yes. It was added on May 27, 2026 with a federal remediation due date of Jun 10, 2026.
Public exploit code is available.
Fixed versions are available, including @tanstack/arktype-adapter 1.166.16, @tanstack/eslint-plugin-router 1.161.13, @tanstack/eslint-plugin-start 0.0.8.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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