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Vulnerabilities

Vulnerability · MAL-2026-14300

Malicious code in eth-react-provider (npm)

Published Aug 19, 2026 · catalog updated Oct 14, 2026 · Malicious code in eth-react-provider

Open the advisory

Exploitation likelihood is not on this record for MAL-2026-14300. A missing EPSS score is not a low risk. Compare Malicious code in eth-react-provider with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Malicious code in eth-react-provider).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
npm eth-react-provider

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7b9bdf79a694cbf6d1a840541b4c47fdac8dc6ac32f4b6a3d4887d5f81233387) The package advertises itself as a React Ethereum provider exporting EthereumProvider/useProvider/useSigner/useNetwork hooks, but the shipped main entry lib/index.js contains web3.js Subscriptions code plus a large obfuscated payload wrapped in a Function("ObbvO95", "...") constructor that is invoked at module load. The payload uses randomized hex-named identifiers, a signed-integer decode table, and a doubly-unicode-escaped string body to hide its behavior from static inspection. Any consumer that require('eth-react-provider') executes this opaque code in the installer's process. The src/index.js in the tarball contains the clean web3.js source without this payload, indicating the built artifact was tampered. The README/code mismatch (documented React hook API vs. actual web3.js Subscriptions plus loader) is consistent with a trojanized lookalike package rather than a broken release. ## Source: ghsa-malware (b162f07f49b00538ec535c8fb33f0f6561ec39893acb28e55a8450de8a026322) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm eth-react-provider1.0.0

How to fix MAL-2026-14300

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for MAL-2026-14300. A missing EPSS score is not a low risk. Compare Malicious code in eth-react-provider with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 1.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 19, 2026 · CIRCL Vulnerability Lookup

    Detected

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7b9bdf79a694cbf6d1a840541b4c47fdac8dc6ac32f4b6a3d4887d5f81233387) The package advertises itself as a React Ethereum provider exporting EthereumProvider/useProvider/useSigner/useNetwork hooks, but the shipped main entry lib/index.js contains web3.js Subscriptions code plus a large obfuscated payload wrapped in

  2. Oct 14, 2026 · CIRCL Vulnerability Lookup

    Updated

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7b9bdf79a694cbf6d1a840541b4c47fdac8dc6ac32f4b6a3d4887d5f81233387) The package advertises itself as a React Ethereum provider exporting EthereumProvider/useProvider/useSigner/useNetwork hooks, but the shipped main entry lib/index.js contains web3.js Subscriptions code plus a large obfuscated payload wrapped in

  3. Oct 14, 2026 · GitHub Advisory Database

    Updated

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7b9bdf79a694cbf6d1a840541b4c47fdac8dc6ac32f4b6a3d4887d5f81233387) The package advertises itself as a React Ethereum provider exporting EthereumProvider/useProvider/useSigner/useNetwork hooks, but the shipped main entry lib/index.js contains web3.js Subscriptions code plus a large obfuscated payload wrapped in

Sources

References

Freshness

Last verified in this catalog Oct 14, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.