{"schema_version":"1","data":[{"id":7897,"advisory_id":"f91a6e60-9d70-4c16-aeb2-44dab74051d5","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-102823","source_published_at":"2026-09-29T18:25:58.084+00:00","published_at":"2026-10-24T22:52:21.680858+00:00","extraction_method":"structured","technologies":["core-cve","russh"],"cve_ids":["CVE-2026-102823"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"russh: Client-side channel-scoped Handler callbacks fire for channel IDs the client never opened","summary":"Russh is a Rust SSH client and server library. Prior to 0.63.1, client_read_authenticated in russh/src/client/encrypted.rs forwards CHANNEL_DATA, CHANNEL_EXTENDED_DATA, CHANNEL_EOF, CHANNEL_CLOSE, CHANNEL_OPEN_FAILURE, CHANNEL_SUCCESS, CHANNEL_FAILURE, and CHANNEL_REQUEST subtypes exit-status, exit-signal, and xon-xoff to public client::Handler callbacks without confirming that the ChannelId belongs to a channel the client opened and established. A malicious SSH server can send lifecycle events for predicted, unopened, unconfirmed, or released channel identifiers, causing application panics or corrupting command completion and exit-code tracking. This issue is fixed in version 0.63.1.","evidence":"cve:CVE-2026-102823","products":[{"name":{"value":"russh","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"high","structured":{"id":"CVE-2026-102823","aliases":["CVE-2026-102823"],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}}],"affected":[{"vendor":"Eugeny","product":"russh","versions":[{"status":"affected","version":"< 0.63.1"}]}],"modified":"2026-10-02T12:20:10.605Z","provider":"cve","references":["https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm","https://github.com/Eugeny/russh/commit/3430fd26ecafc0dc3705210f5f39a9119fa22774","https://github.com/Eugeny/russh/releases/tag/v0.63.1"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-102823","role":"CISA Coordinator","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-02T12:19:44.206468Z"}}}],"references":[{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-47hw-gvq5-r2gm","tags":["exploit"]}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-02T12:20:10.605Z"}}],"cna":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-29T18:25:58.084Z"}}},"related_cves":[{"value":"CVE-2026-102823","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"}}],"next_after":7897,"next_before":7897}