{"cve":"CVE-2020-15091","nvd":{"published":"2020-07-02T17:15:12.547","modified":"2026-06-17T02:56:02.070","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-347"],"references":["https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340","https://github.com/tendermint/tendermint/issues/4926","https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3","https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340","https://github.com/tendermint/tendermint/issues/4926"],"products":["tendermint:tendermint"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-15091","score":0.00905,"percentile":0.59824,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-6jqj-f58p-mrw3","url":"https://osv.dev/vulnerability/GHSA-6jqj-f58p-mrw3","summary":"Denial of Service in TenderMint","modified":"2026-07-08T06:29:36.572560696Z","packages":[{"ecosystem":"Go","name":"github.com/tendermint/tendermint","purl":"pkg:golang/github.com/tendermint/tendermint","ranges":["<0.33.6"],"fixed":["0.33.6"]}]},{"id":"GO-2021-0090","url":"https://osv.dev/vulnerability/GO-2021-0090","summary":"Denial of service in github.com/tendermint/tendermint","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/tendermint/tendermint","purl":"pkg:golang/github.com/tendermint/tendermint","ranges":[">=0.33.0 <0.34.0-dev1.0.20200702134149-480b995a3172"],"fixed":["0.34.0-dev1.0.20200702134149-480b995a3172"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}