{"items":[{"id":"NVI-00008861","kind":"vulnerability","title":"H2O affected by a deserialization vulnerability","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5w3j-gwgh-4rfv","CVE-2025-6544"],"plain_summary":"GitHub lists this reviewed advisory for ai.h2o:h2o-core, h2o. 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-948e4fa0a4f6032c4331ed2356007498"],"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":"2026-10-27T16:41:33.000Z","value":"9.8 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0cdc006fbf93bd8c7e952ae243df927a"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.919%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.60256. Missing scores are unknown.","source_id":"sr-948e4fa0a4f6032c4331ed2356007498"}],"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-0cdc006fbf93bd8c7e952ae243df927a","url":"https://github.com/advisories/GHSA-5w3j-gwgh-4rfv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5w3j-gwgh-4rfv","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-948e4fa0a4f6032c4331ed2356007498","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-2025-6544","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.373Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0cdc006fbf93bd8c7e952ae243df927a"],"technology":"ai.h2o:h2o-core","known_exclusions":[],"conditions_summary":"A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.","public_affected_ranges":["<= 3.46.0.7"]},{"certainty":"source_listed","source_ids":["sr-0cdc006fbf93bd8c7e952ae243df927a"],"technology":"h2o","known_exclusions":[],"conditions_summary":"A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.","public_affected_ranges":["<= 3.46.0.7"]}],"null_published_at":"2026-11-04T02:53:03.132Z","source_updated_at":"2026-10-27T16:41:33.000Z","source_disclosed_at":"2025-09-22T18:30:34.000Z","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":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00008861","kind":"vulnerability","title":"H2O affected by a deserialization vulnerability","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5w3j-gwgh-4rfv","CVE-2025-6544"],"plain_summary":"GitHub lists this reviewed advisory for ai.h2o:h2o-core, h2o. 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-0cdc006fbf93bd8c7e952ae243df927a"],"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":"2026-10-27T16:41:33.000Z","value":"9.8 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0cdc006fbf93bd8c7e952ae243df927a"}],"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-0cdc006fbf93bd8c7e952ae243df927a","url":"https://github.com/advisories/GHSA-5w3j-gwgh-4rfv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5w3j-gwgh-4rfv","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0cdc006fbf93bd8c7e952ae243df927a"],"technology":"ai.h2o:h2o-core","known_exclusions":[],"conditions_summary":"A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.","public_affected_ranges":["<= 3.46.0.7"]},{"certainty":"source_listed","source_ids":["sr-0cdc006fbf93bd8c7e952ae243df927a"],"technology":"h2o","known_exclusions":[],"conditions_summary":"A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.","public_affected_ranges":["<= 3.46.0.7"]}],"null_published_at":"2026-10-31T22:13:27.120Z","source_updated_at":"2026-10-27T16:41:33.000Z","source_disclosed_at":"2025-09-22T18:30:34.000Z","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":"2026-10-31T21:56:36.327Z"}],"next_cursor":null,"snapshot_revision":"42594"}