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CVE-2026-45321· NVD / CVE Program· CNA GitHub_M

Malware in 42 @tanstack/* packages exfiltrates cloud credentials, GitHub tokens, and SSH keys

Noroxi assessment

Priority: This week (action score 68/100)

  • CISA has confirmed exploitation in the wild (May 27, 2026); it is known to be used in ransomware campaigns. Remediation deadline for US federal agencies: Jun 10, 2026.
  • Probability of exploitation in the next 30 days: 1% (FIRST EPSS); higher than 63.7% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: @tanstack/arktype-adapter (npm) 1.166.16; @tanstack/eslint-plugin-router (npm) 1.161.13; @tanstack/eslint-plugin-start (npm) 0.0.8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Upgrade to @tanstack/arktype-adapter (npm) 1.166.16; @tanstack/eslint-plugin-router (npm) 1.161.13; @tanstack/eslint-plugin-start (npm) 0.0.8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

CriticalCVSS 9.6 · v3.1KEVWeaponized Fix available
Published
May 11, 2026
Updated
Aug 4, 2026
EPSS
1.0% · 63th percentile

Report tools

JSON

Action score

68

This week

Don’t wait for the next maintenance window.

CVSS
38 / 40 · 9.6 / 10
CISA KEV
30 / 30 · Listed
EPSS
0 / 30 · 1.0%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
9.6
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on May 27, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jun 10, 2026.

Known to be used in ransomware campaigns.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-45321

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
tanstacktanstack\/arktype-adapter
tanstacktanstack\/eslint-plugin-router
tanstacktanstack\/eslint-plugin-start
tanstacktanstack\/history
tanstacktanstack\/nitro-v2-vite-plugin
tanstacktanstack\/react-router
tanstacktanstack\/react-router-devtools
tanstacktanstack\/react-router-ssr-query
tanstacktanstack\/react-start
tanstacktanstack\/react-start-client
tanstacktanstack\/react-start-rsc
tanstacktanstack\/react-start-server

and 159 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • abhishake1 supersurkhet/cli0.0.2
  • abhishake1 supersurkhet/cli0.0.3
  • abhishake1 supersurkhet/cli0.0.4
  • abhishake1 supersurkhet/cli0.0.5
  • abhishake1 supersurkhet/cli0.0.6
  • abhishake1 supersurkhet/cli0.0.7
  • abhishake1 supersurkhet/sdk0.0.2
  • abhishake1 supersurkhet/sdk0.0.3
  • abhishake1 supersurkhet/sdk0.0.4
  • abhishake1 supersurkhet/sdk0.0.5
  • abhishake1 supersurkhet/sdk0.0.6
  • abhishake1 supersurkhet/sdk0.0.7
  • abhishake1 taskflow-corp/cli0.1.24
  • abhishake1 taskflow-corp/cli0.1.25
  • abhishake1 taskflow-corp/cli0.1.26
  • abhishake1 taskflow-corp/cli0.1.27
  • abhishake1 taskflow-corp/cli0.1.28
  • abhishake1 taskflow-corp/cli0.1.29
  • agentworkhq agentwork-cli0.1.4
  • agentworkhq agentwork-cli0.1.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • @tanstack arktype-adapter

    • 1.166.12, 1.166.15affected

  • @tanstack eslint-plugin-router

    • 1.161.9, 1.161.12affected

  • @tanstack eslint-plugin-start

    • 0.0.4, 0.0.7affected

  • @tanstack history

    • 1.161.9, 1.161.12affected

  • @tanstack nitro-v2-vite-plugin

    • 1.154.12, 1.154.15affected

  • @tanstack outer-vite-plugin

    • 1.166.53, 1.166.56affected

  • @tanstack react-router

    • 1.169.5, 1.169.8affected

  • @tanstack react-router-devtools

    • 1.166.16, 1.166.19affected

  • @tanstack react-router-ssr-query

    • 1.166.15, 1.166.18affected

  • @tanstack react-start

    • 1.167.68, 1.167.71affected

  • @tanstack react-start-client

    • 1.166.51, 1.166.54affected

  • @tanstack react-start-rsc

    • 0.0.47, 0.0.50affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
npm@tanstack/arktype-adapterfrom 1.166.12 · before 1.166.161.166.16
npm@tanstack/arktype-adapterfrom 1.166.15 · before 1.166.161.166.16
npm@tanstack/eslint-plugin-routerfrom 1.161.12 · before 1.161.131.161.13
npm@tanstack/eslint-plugin-routerfrom 1.161.9 · before 1.161.131.161.13
npm@tanstack/eslint-plugin-startfrom 0.0.4 · before 0.0.80.0.8
npm@tanstack/eslint-plugin-startfrom 0.0.7 · before 0.0.80.0.8
npm@tanstack/historyfrom 1.161.12 · before 1.161.131.161.13
npm@tanstack/historyfrom 1.161.9 · before 1.161.131.161.13
npm@tanstack/nitro-v2-vite-pluginfrom 1.154.12 · before 1.154.161.154.16
npm@tanstack/nitro-v2-vite-pluginfrom 1.154.15 · before 1.154.161.154.16
npm@tanstack/react-routerfrom 1.169.5 · before 1.169.91.169.9
npm@tanstack/react-routerfrom 1.169.8 · before 1.169.91.169.9
npm@tanstack/react-router-devtoolsfrom 1.166.16 · before 1.166.201.166.20
npm@tanstack/react-router-devtoolsfrom 1.166.19 · before 1.166.201.166.20
npm@tanstack/react-router-ssr-queryfrom 1.166.15 · before 1.166.191.166.19
npm@tanstack/react-router-ssr-queryfrom 1.166.18 · before 1.166.191.166.19
npm@tanstack/react-startfrom 1.167.68 · before 1.167.721.167.72
npm@tanstack/react-startfrom 1.167.71 · before 1.167.721.167.72
npm@tanstack/react-start-clientfrom 1.166.51 · before 1.166.551.166.55
npm@tanstack/react-start-clientfrom 1.166.54 · before 1.166.551.166.55
npm@tanstack/react-start-rscfrom 0.0.47 · before 0.0.510.0.51
npm@tanstack/react-start-rscfrom 0.0.50 · before 0.0.510.0.51
npm@tanstack/react-start-serverfrom 1.166.55 · before 1.166.591.166.59
npm@tanstack/react-start-serverfrom 1.166.58 · before 1.166.591.166.59

+60

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
npm:@tanstack/arktype-adapter1.166.16Package registry (OSV)
npm:@tanstack/eslint-plugin-router1.161.13Package registry (OSV)
npm:@tanstack/eslint-plugin-start0.0.8Package registry (OSV)
npm:@tanstack/history1.161.13Package registry (OSV)
npm:@tanstack/nitro-v2-vite-plugin1.154.16Package registry (OSV)
npm:@tanstack/react-router1.169.9Package registry (OSV)
npm:@tanstack/react-router-devtools1.166.20Package registry (OSV)
npm:@tanstack/react-router-ssr-query1.166.19Package registry (OSV)
npm:@tanstack/react-start1.167.72Package registry (OSV)
npm:@tanstack/react-start-client1.166.55Package registry (OSV)
npm:@tanstack/react-start-rsc0.0.51Package registry (OSV)
npm:@tanstack/react-start-server1.166.59Package registry (OSV)
npm:@tanstack/router-cli1.166.50Package registry (OSV)
npm:@tanstack/router-core1.169.9Package registry (OSV)
npm:@tanstack/router-devtools1.166.20Package registry (OSV)
npm:@tanstack/router-devtools-core1.167.10Package registry (OSV)
npm:@tanstack/router-generator1.166.49Package registry (OSV)
npm:@tanstack/router-plugin1.167.42Package registry (OSV)
npm:@tanstack/router-ssr-query-core1.168.7Package registry (OSV)
npm:@tanstack/router-utils1.161.15Package registry (OSV)
npm:@tanstack/router-vite-plugin1.166.57Package registry (OSV)
npm:@tanstack/solid-router1.169.9Package registry (OSV)
npm:@tanstack/solid-router-devtools1.166.20Package registry (OSV)
npm:@tanstack/solid-router-ssr-query1.166.19Package registry (OSV)
npm:@tanstack/solid-start1.167.69Package registry (OSV)
npm:@tanstack/solid-start-client1.166.54Package registry (OSV)
npm:@tanstack/solid-start-server1.166.58Package registry (OSV)
npm:@tanstack/start-client-core1.168.9Package registry (OSV)
npm:@tanstack/start-fn-stubs1.161.13Package registry (OSV)
npm:@tanstack/start-plugin-core1.169.27Package registry (OSV)

+12

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×12

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-05-12
Proof-of-concept repository on GitHubstars:02026-05-12
Proof-of-concept repository on GitHubstars:02026-05-12
Proof-of-concept repository on GitHubstars:12026-05-12
Proof-of-concept repository on GitHubstars:12026-05-12
Proof-of-concept repository on GitHubstars:22026-05-13
Proof-of-concept repository on GitHubstars:22026-05-16
Proof-of-concept repository on GitHubstars:02026-05-16
Proof-of-concept repository on GitHubstars:12026-05-18
Proof-of-concept repository on GitHubstars:02026-05-20
Proof-of-concept repository on GitHubstars:02026-05-25
Proof-of-concept repository on GitHubstars:02026-06-25

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoCsame day
  3. CISA KEV+15 d
  4. TodayOct 18, 2026+159 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-506 · Embedded Malicious Code

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records