{"id":"GHSA-39qr-rc93-vhqm","summary":"Bird-lg-go has a Fatal Out-of-Memory (OOM) Denial of Service via Unbounded JSON Decoding","details":"### Summary\nThe `apiHandler` (and similarly `webHandlerTelegramBot`) processes user-provided JSON payloads by directly using `json.NewDecoder(r.Body).Decode(&request)` without restricting the maximum read size. An unauthenticated remote attacker can stream an extremely large, endless JSON payload (e.g., several Gigabytes of padding) over a single TCP connection. Because Go's JSON decoder attempts to allocate memory for the entire parsed structure, this rapidly exhausts the host's physical RAM or container limits, leading to an unrecoverable `fatal error: runtime: out of memory`. \n\nThis causes the Linux OOM Killer to instantly terminate the entire `bird-lg-go` daemon, resulting in a severe Remote Denial of Service (RDoS).\n\n### Details\nIn `api.go`:\n```go\nfunc apiHandler(w http.ResponseWriter, r *http.Request) {\n    var request apiRequest\n    // VULNERABILITY: No http.MaxBytesReader protection before JSON decode\n    err := json.NewDecoder(r.Body).Decode(&request) \n    // ...","aliases":["CVE-2026-45047","GO-2026-5077"],"modified":"2026-06-25T18:56:19.506461933Z","published":"2026-05-11T16:17:48Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-05-11T16:17:48Z","nvd_published_at":"2026-05-27T18:16:24Z","cwe_ids":["CWE-400"]},"references":[{"type":"WEB","url":"https://github.com/xddxdd/bird-lg-go/security/advisories/GHSA-39qr-rc93-vhqm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45047"},{"type":"WEB","url":"https://github.com/xddxdd/bird-lg-go/commit/0ff87024cb9ed01fc5f5fdc6f4603fce4c123922"},{"type":"PACKAGE","url":"https://github.com/xddxdd/bird-lg-go"},{"type":"WEB","url":"https://github.com/xddxdd/bird-lg-go/releases/tag/v1.4.5"}],"affected":[{"package":{"name":"github.com/xddxdd/bird-lg-go","ecosystem":"Go","purl":"pkg:golang/github.com/xddxdd/bird-lg-go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20260507060110-0ff87024cb9e"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-39qr-rc93-vhqm/GHSA-39qr-rc93-vhqm.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}