{"items":[{"id":"NVI-00016150","kind":"vulnerability","title":"PostgreSQL JDBC Driver: Silent channel-binding authentication downgrade via unsupported certificate algorithms","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j92g-9f8w-j867","CVE-2026-54291"],"plain_summary":"GitHub lists this reviewed advisory for org.postgresql:postgresql. 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-317c7c5e07eab091d20d08e33c32b9e7"],"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-317c7c5e07eab091d20d08e33c32b9e7","url":"https://github.com/advisories/GHSA-j92g-9f8w-j867","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j92g-9f8w-j867","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:34:49.300Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-317c7c5e07eab091d20d08e33c32b9e7"],"technology":"org.postgresql:postgresql","known_exclusions":[],"conditions_summary":"### Impact\n\n`channelBinding=require` connections can be silently downgraded from `SCRAM-SHA-256-PLUS` (with channel binding) to plain `SCRAM-SHA-256` (without it), losing the man-in-the-middle protection the setting is meant to guarantee. An attacker who can intercept the TLS connection triggers the downgrade with a certificate whose signature algorithm has no `tls-server-end-point` channel-binding hash. Examples are `Ed25519`, `Ed448`, and post-quantum algorithms.\n\nTwo issues combine in releases 42.7.4 through 42.7.11:\n\n1. The bundled `com.ongres.scram:scram-client` (3.1 or 3.2) returns an empty byte array instead of failing when it cannot derive the binding hash for such a certificate. This is the library issue tracked as GHSA-p9jg-fcr6-3mhf.\n2. pgJDBC does not enforce `channelBinding=require` where it matters. `ScramAuthenticator` checks only that the server *advertised* a `-PLUS` mechanism; it neither rejects the empty binding nor checks that the *negotiated* mechanism uses channel binding. The connection therefore downgrades silently, and would do so even against a fixed `scram-client`, because the miss","public_affected_ranges":[">= 42.7.4, < 42.7.12"]}],"null_published_at":"2026-11-04T10:04:27.899Z","source_updated_at":"2026-07-21T17:47:40.000Z","source_disclosed_at":"2026-07-21T17:47:39.000Z","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":"2026-11-03T22:34:49.300Z"}],"next_cursor":null,"snapshot_revision":"42594"}