{"items":[{"id":"NVI-00008935","kind":"vulnerability","title":"russh's SSH client is susceptible to unbounded allocations via EXT_INFO packets","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-4p9f-7p9m-5vfg","CVE-2026-116773"],"plain_summary":"GitHub lists this reviewed advisory for russh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2f1ae2c9e32855c8cf90cee5711de7de"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-30T22:58:40.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3d10bc7b9f245a9939a4812ddd4267c5"},{"kind":"CVSS","as_of":"2026-10-30T16:17:41.327Z","value":"4.3 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-27c86fb403f1d3037d76e93d1c2bc30e"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.258%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.17488. Missing scores are unknown.","source_id":"sr-2f1ae2c9e32855c8cf90cee5711de7de"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3d10bc7b9f245a9939a4812ddd4267c5","url":"https://github.com/advisories/GHSA-4p9f-7p9m-5vfg","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4p9f-7p9m-5vfg","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-27c86fb403f1d3037d76e93d1c2bc30e","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116773","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-116773","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:08.616Z"},{"id":"sr-2f1ae2c9e32855c8cf90cee5711de7de","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116773","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.843Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3d10bc7b9f245a9939a4812ddd4267c5"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\n**All evidence, reproduction steps, and scripts in the report were verified against a real running instance. Nothing is fabricated or synthetic; every verdict is backed by captured output from an actual deployment.** Concretely, the evidence comes from executing the real russh v0.64.1 client packet parser (`Session::process_packet` handling `handle_ext_info`) in a live client session with attacker-supplied packet bodies in the pre-authentication state; the captured output below is from that real execution.\n\nrussh's client stores every extension name it parses out of an `EXT_INFO` packet into a per-session vector and never clears, caps, or deduplicates it (`russh/src/client/encrypted.rs:433`, field declared at `russh/src/session.rs:60`). The packet is accepted without limit in the pre-authentication states, so a server - which is exactly the attacker position for a client library, and remains one even after the client has verified its host key - can send an unbounded sequence of these packets and grow the client's memory for as long as the session lives: 400 packets of about 26 KB each, carrying 3000 extension names apiece, retained 49.1 MiB (about 4.8 times the wire by","public_affected_ranges":["< 0.65"]}],"null_published_at":"2026-11-08T19:53:38.925Z","source_updated_at":"2026-10-30T22:58:40.000Z","source_disclosed_at":"2026-10-30T22:58:39.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00008935","kind":"vulnerability","title":"russh's SSH client is susceptible to unbounded allocations via EXT_INFO packets","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-4p9f-7p9m-5vfg","CVE-2026-116773"],"plain_summary":"GitHub lists this reviewed advisory for russh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-27c86fb403f1d3037d76e93d1c2bc30e"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-30T22:58:40.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3d10bc7b9f245a9939a4812ddd4267c5"},{"kind":"CVSS","as_of":"2026-10-30T16:17:41.327Z","value":"4.3 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-27c86fb403f1d3037d76e93d1c2bc30e"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3d10bc7b9f245a9939a4812ddd4267c5","url":"https://github.com/advisories/GHSA-4p9f-7p9m-5vfg","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4p9f-7p9m-5vfg","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-27c86fb403f1d3037d76e93d1c2bc30e","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116773","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-116773","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:08.616Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3d10bc7b9f245a9939a4812ddd4267c5"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\n**All evidence, reproduction steps, and scripts in the report were verified against a real running instance. Nothing is fabricated or synthetic; every verdict is backed by captured output from an actual deployment.** Concretely, the evidence comes from executing the real russh v0.64.1 client packet parser (`Session::process_packet` handling `handle_ext_info`) in a live client session with attacker-supplied packet bodies in the pre-authentication state; the captured output below is from that real execution.\n\nrussh's client stores every extension name it parses out of an `EXT_INFO` packet into a per-session vector and never clears, caps, or deduplicates it (`russh/src/client/encrypted.rs:433`, field declared at `russh/src/session.rs:60`). The packet is accepted without limit in the pre-authentication states, so a server - which is exactly the attacker position for a client library, and remains one even after the client has verified its host key - can send an unbounded sequence of these packets and grow the client's memory for as long as the session lives: 400 packets of about 26 KB each, carrying 3000 extension names apiece, retained 49.1 MiB (about 4.8 times the wire by","public_affected_ranges":["< 0.65"]}],"null_published_at":"2026-11-03T10:03:31.384Z","source_updated_at":"2026-10-30T22:58:40.000Z","source_disclosed_at":"2026-10-30T22:58:39.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00008935","kind":"vulnerability","title":"russh's SSH client is susceptible to unbounded allocations via EXT_INFO packets","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-4p9f-7p9m-5vfg","CVE-2026-116773"],"plain_summary":"GitHub lists this reviewed advisory for russh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-3d10bc7b9f245a9939a4812ddd4267c5"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-30T22:58:40.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3d10bc7b9f245a9939a4812ddd4267c5"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3d10bc7b9f245a9939a4812ddd4267c5","url":"https://github.com/advisories/GHSA-4p9f-7p9m-5vfg","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4p9f-7p9m-5vfg","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3d10bc7b9f245a9939a4812ddd4267c5"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\n**All evidence, reproduction steps, and scripts in the report were verified against a real running instance. Nothing is fabricated or synthetic; every verdict is backed by captured output from an actual deployment.** Concretely, the evidence comes from executing the real russh v0.64.1 client packet parser (`Session::process_packet` handling `handle_ext_info`) in a live client session with attacker-supplied packet bodies in the pre-authentication state; the captured output below is from that real execution.\n\nrussh's client stores every extension name it parses out of an `EXT_INFO` packet into a per-session vector and never clears, caps, or deduplicates it (`russh/src/client/encrypted.rs:433`, field declared at `russh/src/session.rs:60`). The packet is accepted without limit in the pre-authentication states, so a server - which is exactly the attacker position for a client library, and remains one even after the client has verified its host key - can send an unbounded sequence of these packets and grow the client's memory for as long as the session lives: 400 packets of about 26 KB each, carrying 3000 extension names apiece, retained 49.1 MiB (about 4.8 times the wire by","public_affected_ranges":["< 0.65"]}],"null_published_at":"2026-10-31T22:13:27.123Z","source_updated_at":"2026-10-30T22:58:40.000Z","source_disclosed_at":"2026-10-30T22:58:39.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:55:49.621Z"}],"next_cursor":null,"snapshot_revision":"42594"}