CVE-2020-15091Denial of Service in TenderMint
- 6.5MediumCVSS base score
- 0.91%Exploitation in 30 daysEPSS · top 40% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By GitHub_M
- 7 days later
· 7 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.91% · top 40% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
- affected >= 0.33.0, < 0.33.6
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/tendermint/tendermintGHSA-6jqj-f58p-mrw3 (opens in a new tab)
References
References3
- https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/tendermint/tendermint/issues/4926 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-2459 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-6jqj-f58p-mrw3 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-15091)Record last updated .