ThreatCluster

MANTRA Chain Mainnet Halted Due to Exploit Mitigation

First seen 21 Aug 2026, 23:47 UTC •58

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ThreatCluster •August 22, 2026 at 22:47 UTC

•MANTRA Chain Mainnet halted at block 17,449,398 to address a security exploit.
•No third-party funds were impacted; root cause and attack vectors have been identified and mitigated.
•The v8.4.0 patch is in pre-release, with dry-run testing successfully completed.

The MANTRA Chain Mainnet (mantra-1) was halted at block 17,449,398 following the identification of an exploit. A full state snapshot was taken before the halt, ensuring no third-party user, exchange, or partner funds were impacted. The root cause analysis has been completed, and the attack vectors associated with the exploit have been mitigated in the upcoming v8.4.0 patched release. This version is currently in pre-release, having been validated against an internal chain environment with successful dry-run testing. The network remains halted to coordinate a single, coordinated upgrade among validators. The upgrade will patch the vulnerability in the EVM module exploited and includes additional security hardening. Validator instructions are being coordinated, with binaries to be taken only from the official release tag. The restart window will be posted once validator coverage is confirmed.

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Timeline

2026-08-21

MANTRA Chain Mainnet halted

The network was halted at block 17,449,398 due to the identification of an exploit, ensuring no funds were impacted.

2026-08-21

Root cause analysis completed

The root cause of the exploit was identified, and associated attack vectors were mitigated in the upcoming patch.

2026-08-21

v8.4.0 patch in pre-release

The patch has been validated against an internal environment and includes security hardening.

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Threat Graph

4 entities, 3 inferred relationships (STIX 2.1).

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Technique (2)

Supply Chain Attack
T1195 - Supply Chain Compromise

Organization (1)

Mantra Chain

Affected Platform (1)

DuKong Testnet

Relationships

Supply Chain Attack targets DuKong Testnet
T1195 - Supply Chain Compromise targets DuKong Testnet
Supply Chain Attack related to Mantra Chain

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