What’s Vulnerable › Vulnerabilities

CVE-2023-34458: mx-chain-go's relayed transactions always increment nonce

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-13 · updated 2026-06-17
• Weakness: CWE-400

Description

mx-chain-go is the official implementation of the MultiversX blockchain protocol, written in golang. When executing a relayed transaction, if the inner transaction failed, it would have increased the inner transaction's sender account nonce. This could have contributed to a limited DoS attack on a targeted account. The fix is a breaking change so a new flag `RelayedNonceFixEnableEpoch` was needed. This was a strict processing issue while validating blocks on a chain. This vulnerability has been patched in version 1.4.17.

Affected products

• multiversx mx-chain-go: before 1.4.17 — fixed in 1.4.17

How to fix

Upgrade to a fixed version: multiversx mx-chain-go 1.4.17. Check the vendor advisory for mitigations.

References

• https://github.com/multiversx/mx-chain-go/blob/babdb144f1316ab6176bf3dbd7d4621120414d43/integrationTests/vm/txsFee/relayedMoveBalance_test.go#LL165C14-L165C14
• https://github.com/multiversx/mx-chain-go/commit/babdb144f1316ab6176bf3dbd7d4621120414d43
• https://github.com/multiversx/mx-chain-go/releases/tag/v1.4.17
• https://github.com/multiversx/mx-chain-go/security/advisories/GHSA-j494-7x2v-vvvp
• https://github.com/multiversx/mx-chain-go/blob/babdb144f1316ab6176bf3dbd7d4621120414d43/integrationTests/vm/txsFee/relayedMoveBalance_test.go#LL165C14-L165C14
• https://github.com/multiversx/mx-chain-go/commit/babdb144f1316ab6176bf3dbd7d4621120414d43
• https://github.com/multiversx/mx-chain-go/releases/tag/v1.4.17
• https://github.com/multiversx/mx-chain-go/security/advisories/GHSA-j494-7x2v-vvvp

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