{"items":[{"id":"NVI-00018315","kind":"vulnerability","title":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vwqq-5vrc-xw9h","CVE-2020-9488"],"plain_summary":"GitHub lists this reviewed advisory for org.apache.logging.log4j:log4j, org.apache.logging.log4j:log4j-core, org.apache.logging.log4j:log4j, org.apache.logging.log4j:log4j, org.apache.logging.log4j:log4j-core. 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-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"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":"2026-06-09T10:30:10.000Z","value":"3.7 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"}],"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-0e9a8176a9cd8aa7f2129d0c63ddf9b0","url":"https://github.com/advisories/GHSA-vwqq-5vrc-xw9h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vwqq-5vrc-xw9h","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T20:58:31.464Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"technology":"org.apache.logging.log4j:log4j","known_exclusions":[],"conditions_summary":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.","public_affected_ranges":[">= 2.13.0, < 2.13.2"]},{"certainty":"source_listed","source_ids":["sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"technology":"org.apache.logging.log4j:log4j-core","known_exclusions":[],"conditions_summary":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.","public_affected_ranges":[">= 2.13.0, < 2.13.2"]},{"certainty":"source_listed","source_ids":["sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"technology":"org.apache.logging.log4j:log4j","known_exclusions":[],"conditions_summary":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.","public_affected_ranges":[">= 2.4.0, < 2.12.3"]},{"certainty":"source_listed","source_ids":["sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"technology":"org.apache.logging.log4j:log4j","known_exclusions":[],"conditions_summary":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.","public_affected_ranges":["< 2.3.2"]},{"certainty":"source_listed","source_ids":["sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"technology":"org.apache.logging.log4j:log4j-core","known_exclusions":[],"conditions_summary":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.","public_affected_ranges":[">= 2.4.0, < 2.12.3"]},{"certainty":"source_listed","source_ids":["sr-0e9a8176a9cd8aa7f2129d0c63ddf9b0"],"technology":"org.apache.logging.log4j:log4j-core","known_exclusions":[],"conditions_summary":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.","public_affected_ranges":["< 2.3.2"]}],"null_published_at":"2026-11-07T07:07:39.809Z","source_updated_at":"2026-06-09T10:30:10.000Z","source_disclosed_at":"2020-06-05T14:15:51.000Z","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":"2026-11-06T20:58:31.464Z"}],"next_cursor":null,"snapshot_revision":"42594"}