CVE-2023-30543
`chainId` may be outdated if user changes chains as part of connection in @web3-react
@web3-react is a framework for building Ethereum Apps . In affected versions the chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect. For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This issue has been addressed in PR #749 and is available in updated npm artifacts. There are no known workarounds for this issue. Users are advised to upgrade.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
`chainId` may be outdated if user changes chains as part of connection in @web3-react
@web3-react is a framework for building Ethereum Apps . In affected versions the chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect. For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This issue has been addressed in PR #749 and is available in updated npm artifacts. There are no known workarounds for this issue. Users are advised to upgrade.
- Record
CVE-2023-30543- CVSS 3.1
- 5.2 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
EUVDEUVD-2023-1241
@web3-react is a framework for building Ethereum Apps . In affected versions the chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect. For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This issue has been addressed in PR #749 and is available in updated npm artifacts. There are no known workarounds for this issue. Users are advised to upgrade.
- Record
EUVD-2023-1241- CVSS 3.1
- 5.2 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8pf3-6fgr-3g3g
`chainId` may be outdated if user changes chains as part of connection in @web3-react
Impact
chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect.
For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This is a common approach when using other foundational libraries like ethers, and most users of v8 will want to upgrade past the affected versions.
Patches
Patched in https://github.com/Uniswap/web3-react/pull/749. Users of [email protected] should upgrade to at least:
- @web3-react/coinbase-wallet@^8.0.35-beta.0
- @web3-react/eip1193@^8.0.27-beta.0
- @web3-react/metamask@^8.0.30-beta.0
- @web3-react/walletconnect@^8.0.37-beta.0
Workarounds
N/A
References
N/A
- Record
GHSA-8pf3-6fgr-3g3g- CVSS 3.1
- 5.2 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
NVD
@web3-react is a framework for building Ethereum Apps . In affected versions the chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect. For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This issue has been addressed in PR #749 and is available in updated npm artifacts. There are no known workarounds for this issue. Users are advised to upgrade.
- Record
CVE-2023-30543- CVSS 3.1
- 5.2 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:L - CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N - Weakness
- CWE-362
- Updated
- 2026-11-02
OSV
`chainId` may be outdated if user changes chains as part of connection in @web3-react
@web3-react is a framework for building Ethereum Apps . In affected versions the chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect. For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This issue has been addressed in PR #749 and is available in updated npm artifacts. There are no known workarounds for this issue. Users are advised to upgrade.
- Record
CVE-2023-30543- CVSS 3.1
- 5.2 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVGHSA-8pf3-6fgr-3g3g
`chainId` may be outdated if user changes chains as part of connection in @web3-react
Impact
chainId may be outdated if the user changes chains as part of the connection flow. This means that the value of chainId returned by useWeb3React() may be incorrect. In an application, this means that any data derived from chainId could be incorrect.
For example, if a swapping application derives a wrapped token contract address from the chainId and a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This is a common approach when using other foundational libraries like ethers, and most users of v8 will want to upgrade past the affected versions.
Patches
Patched in https://github.com/Uniswap/web3-react/pull/749. Users of [email protected] should upgrade to at least:
- @web3-react/coinbase-wallet@^8.0.35-beta.0
- @web3-react/eip1193@^8.0.27-beta.0
- @web3-react/metamask@^8.0.30-beta.0
- @web3-react/walletconnect@^8.0.37-beta.0
Workarounds
N/A
References
N/A
- Record
GHSA-8pf3-6fgr-3g3g- CVSS 3.1
- 5.2 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@web3-react/coinbase-walletnpm |
6.0.0 up to 8.0.35-beta.0 | 8.0.35-beta.0 |
@web3-react/eip1193npm |
6.0.0 up to 8.0.27-beta.0 | 8.0.27-beta.0 |
@web3-react/metamasknpm |
6.0.0 up to 8.0.30-beta.0 | 8.0.30-beta.0 |
@web3-react/walletconnectnpm |
6.0.0 up to 8.0.37-beta.0 | 8.0.37-beta.0 |
@web3-react/eip1193npm |
6.0.0 up to 8.0.27-beta | 8.0.27-beta |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-30543 is a medium vulnerability (CVSS 5.2) in Uniswap Web3-react, published April 17, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 31st percentile. Fixed in @web3-react/coinbase-wallet 8.0.35-beta.0.