{"action":"Upgrade github.com/filecoin-project/lotus to 1.5.0 or later.","affected":[{"fixed":"1.5.0","introduced":"0"}],"component":"github.com/filecoin-project/lotus","cve_ids":["CVE-2021-21405"],"ecosystem":"Go","epss":0.00976,"exploited":false,"fixed_versions":["1.5.0"],"ghsa_id":"GHSA-4g52-pqcj-phvh","id":"tcs_01M5KEWJ333E90SCQYF9RWWAVP","modified_at":"2026-07-08T06:29:38.581666683Z","published_at":"2021-05-21T16:23:43Z","references":["https://osv.dev/vulnerability/GHSA-4g52-pqcj-phvh","https://github.com/filecoin-project/lotus/security/advisories/GHSA-4g52-pqcj-phvh","https://nvd.nist.gov/vuln/detail/CVE-2021-21405","https://github.com/filecoin-project/lotus/pull/5393","https://gist.github.com/wadeAlexC/2490d522e81a796af9efcad1686e6754"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"GHSA-4g52-pqcj-phvh","url":"https://osv.dev/vulnerability/GHSA-4g52-pqcj-phvh"}],"summary":"BLS Signature \"Malleability\""}