{"id":"GHSA-w6rp-vxj2-fjhr","aliases":["GO-2023-2156"],"status":"published","title":"Cosmos packet-forward-middleware vulnerable to chain-halt","description":"The Cosmos SDK is used for Inter-Blockchain Communication Protocol (IBC) applications and middleware. The [packet-forward-middleware](https://github.com/cosmos/ibc-apps/tree/main/middleware/packet-forward-middleware) module is an IBC middleware module built for Cosmos blockchains utilizing the IBC protocol allowing routing of incoming IBC packets from a source chain to a destination chain. The `packet-forward-middleware` module is vulnerable to potential chain-halt due to error non-determinism.\n\n### Patches\nPlease patch at your earliest convenience by applying one of the following patch versions, respective to the chain's ibc-go major version:\nv4.1.1\nv5.2.1\nv6.1.1","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2023-10-26T23:10:19Z","modified":"2026-03-03T04:55:07Z","fixes":[{"ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4","fixed_in":["4.1.1"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5","fixed_in":["5.2.1"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6","fixed_in":["6.1.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.1"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.1"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.1.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.2.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"6.1.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v4","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.1.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v5","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.2.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"6.1.1"}]}]}],"references":[{"url":"https://github.com/cosmos/ibc-apps/security/advisories/GHSA-w6rp-vxj2-fjhr","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-w6rp-vxj2-fjhr"},{"url":"https://github.com/cosmos/ibc-apps","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-w6rp-vxj2-fjhr","title":"Cosmos packet-forward-middleware vulnerable to chain-halt","description":"The Cosmos SDK is used for Inter-Blockchain Communication Protocol (IBC) applications and middleware. The [packet-forward-middleware](https://github.com/cosmos/ibc-apps/tree/main/middleware/packet-forward-middleware) module is an IBC middleware module built for Cosmos blockchains utilizing the IBC protocol allowing routing of incoming IBC packets from a source chain to a destination chain. The `packet-forward-middleware` module is vulnerable to potential chain-halt due to error non-determinism.\n\n### Patches\nPlease patch at your earliest convenience by applying one of the following patch versions, respective to the chain's ibc-go major version:\nv4.1.1\nv5.2.1\nv6.1.1","status":"published","published":"2023-10-26T23:10:19Z","modified":"2023-10-26T23:10:20Z","updated_at":"2026-11-02T14:37:10.053831Z"}],"osv":[{"id":"GHSA-w6rp-vxj2-fjhr","title":"Cosmos packet-forward-middleware vulnerable to chain-halt","description":"The Cosmos SDK is used for Inter-Blockchain Communication Protocol (IBC) applications and middleware. The [packet-forward-middleware](https://github.com/cosmos/ibc-apps/tree/main/middleware/packet-forward-middleware) module is an IBC middleware module built for Cosmos blockchains utilizing the IBC protocol allowing routing of incoming IBC packets from a source chain to a destination chain. The `packet-forward-middleware` module is vulnerable to potential chain-halt due to error non-determinism.\n\n### Patches\nPlease patch at your earliest convenience by applying one of the following patch versions, respective to the chain's ibc-go major version:\nv4.1.1\nv5.2.1\nv6.1.1","status":"published","published":"2023-10-26T23:10:19Z","modified":"2024-08-21T14:57:07.751723Z","updated_at":"2026-11-02T15:46:58.401149Z"},{"id":"GO-2023-2156","title":"Cosmos packet-forward-middleware vulnerable to chain-halt in github.com/cosmos/ibc-apps/middleware/packet-forward-middleware","description":"Cosmos packet-forward-middleware vulnerable to chain-halt in github.com/cosmos/ibc-apps/middleware/packet-forward-middleware","status":"published","published":"2024-08-21T14:30:22Z","modified":"2026-03-03T04:55:07.408565Z","updated_at":"2026-11-02T15:47:01.185262Z"}]}}