{"items":[{"id":"NVI-00008915","kind":"vulnerability","title":"russh: Agent server never calls `Agent::confirm`, so keys added with the confirm constraint (`ssh-add -c`) sign without confirmation","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vp5q-ff62-jwqv","CVE-2026-116794"],"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-22fb53973caca69862fb8c0e1fc5adf6"],"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":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.156%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.0473. Missing scores are unknown.","source_id":"sr-22fb53973caca69862fb8c0e1fc5adf6"}],"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-2c19bd5b0f47af755ac2a1fe1cc35a60","url":"https://github.com/advisories/GHSA-vp5q-ff62-jwqv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vp5q-ff62-jwqv","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-22fb53973caca69862fb8c0e1fc5adf6","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-2026-116794","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2c19bd5b0f47af755ac2a1fe1cc35a60"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\nThe agent server in `russh::keys::agent::server` never calls `Agent::confirm` before signing with a key that was added with the confirm constraint. That constraint is `SSH_AGENT_CONSTRAIN_CONFIRM` (RFC 9987 §5.2.7.2), which is what `ssh-add -c` sends.\n\nThe call was replaced by a hard-coded `true` in 3e04597 (\"Native async traits encore\", #455), first released in 0.50.0-beta.12. Every release since, up to and including 0.64.1, signs requests for confirm-constrained keys without asking the `Agent` implementation. A user who added a key with `-c` is therefore never asked to confirm.\n\n### Details\n\n`Connection::try_sign` notes that the key needs confirmation, then awaits a ready future instead of the agent (server.rs L348-L360 at v0.64.1):\n\n```rust\nlet agent = if needs_confirm {\n    let (agent, ok) = {\n        let _pk = key.clone();\n        Box::new(futures::future::ready((agent, true)))\n    }\n    .await;\n    if !ok {\n        return Ok((agent, false));\n    }\n    agent\n} else {\n    agent\n};\n```\n\nBefore [3e04597](https://github.com/Eugeny/russh/commit/3e04","public_affected_ranges":["< 0.65"]}],"null_published_at":"2026-10-31T22:27:09.612Z","source_updated_at":"2026-10-30T22:59:09.000Z","source_disclosed_at":"2026-10-30T22:59:08.000Z","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-00008915","kind":"vulnerability","title":"russh: Agent server never calls `Agent::confirm`, so keys added with the confirm constraint (`ssh-add -c`) sign without confirmation","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vp5q-ff62-jwqv","CVE-2026-116794"],"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-2c19bd5b0f47af755ac2a1fe1cc35a60"],"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":[],"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-2c19bd5b0f47af755ac2a1fe1cc35a60","url":"https://github.com/advisories/GHSA-vp5q-ff62-jwqv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vp5q-ff62-jwqv","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2c19bd5b0f47af755ac2a1fe1cc35a60"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\nThe agent server in `russh::keys::agent::server` never calls `Agent::confirm` before signing with a key that was added with the confirm constraint. That constraint is `SSH_AGENT_CONSTRAIN_CONFIRM` (RFC 9987 §5.2.7.2), which is what `ssh-add -c` sends.\n\nThe call was replaced by a hard-coded `true` in 3e04597 (\"Native async traits encore\", #455), first released in 0.50.0-beta.12. Every release since, up to and including 0.64.1, signs requests for confirm-constrained keys without asking the `Agent` implementation. A user who added a key with `-c` is therefore never asked to confirm.\n\n### Details\n\n`Connection::try_sign` notes that the key needs confirmation, then awaits a ready future instead of the agent (server.rs L348-L360 at v0.64.1):\n\n```rust\nlet agent = if needs_confirm {\n    let (agent, ok) = {\n        let _pk = key.clone();\n        Box::new(futures::future::ready((agent, true)))\n    }\n    .await;\n    if !ok {\n        return Ok((agent, false));\n    }\n    agent\n} else {\n    agent\n};\n```\n\nBefore [3e04597](https://github.com/Eugeny/russh/commit/3e04","public_affected_ranges":["< 0.65"]}],"null_published_at":"2026-10-31T22:13:27.122Z","source_updated_at":"2026-10-30T22:59:09.000Z","source_disclosed_at":"2026-10-30T22:59:08.000Z","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"}