{"id":"CVE-2026-31814","aliases":["GHSA-4w32-2493-32g7"],"url":"https://o3.security/vulnerability/CVE-2026-31814","summary":"Yamux remote Panic via malformed WindowUpdate credit","details":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. From 0.13.0 to before 0.13.9, a specially crafted WindowUpdate can cause arithmetic overflow in send-window accounting, which triggers a panic in the connection state machine. This is remotely reachable over a normal network connection and does not require authentication. This vulnerability is fixed in 0.13.9.","published":"2026-03-13T19:19:41.879Z","modified":"2026-04-10T05:42:09.089537Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"yamux","fixedVersion":"0.13.9"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31814.json"},{"type":"ADVISORY","url":"https://github.com/libp2p/rust-yamux/security/advisories/GHSA-4w32-2493-32g7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31814"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-10T05:42:09.089537Z"}}