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TI-2020-11866 Aliases CVE-2020-15091GHSA-6jqj-f58p-mrw3

Denial of Service in TenderMint

Priority LOW 31CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-347.

Summary

TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit.

Why it matters now

EPSS 0.00905 60th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed tendermint (tendermint): 0.33.6github.com/tendermint/tendermint (Go): 0.33.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
tenderminttendermint0.33.0 to before 0.33.60.33.6Patch availableCNA
—github.com/tendermint/tendermint (Go)before 0.33.60.33.6Patch availableGHSA-6jqj-f58p-mrw3
  • tendermint Vendortendermint Affected 0.33.0 to before 0.33.6 Fixed in 0.33.6 Patch available CNA
  • github.com/tendermint/tendermint (Go) Vendor— Affected before 0.33.6 Fixed in 0.33.6 Patch available GHSA-6jqj-f58p-mrw3

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tendermint:tendermint:*:*:*:*:*:*:*:*0.33.0 to before 0.33.6Vulnerabletendermint
  • cpe:2.3:a:tendermint:tendermint:*:*:*:*:*:*:*:* Versions 0.33.0 to before 0.33.6 Vulnerable ·tendermint

Remediation

  • Fix · CNA tendermint (tendermint) Fixed in 0.33.6
  • Fix · GHSA-6jqj-f58p-mrw3 github.com/tendermint/tendermint (Go) Fixed in 0.33.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15091
  2. 2026-10-03 Alias added: GHSA-6jqj-f58p-mrw3

References

Exploit 2

Patch 1

Advisory 1

Other 4

  • TI-2019-15212 Uncontrolled resource consumption in github.com/tendermint/tendermint CVSS 3.1HIGH 7.5
  • TI-2021-04371 Denial of service in TenderMint Core CVSS 3.1MEDIUM 6.5
  • TI-2020-04359 Denial of service in Tendermint CVSS 3.1LOW 3.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences