{"id":"CVE-2026-110183","kind":"vulnerability","aliases":["CVE-2026-110183"],"related":[],"title":"PostgreSQL Anonymizer: original data statistics leak through pg_stats after masking","description":"PostgreSQL Anonymizer contains a vulnerability related to static masking and statistics persistence. Statistics pertaining to the original data remain visible in pg_stats until an ANALYZE operation is performed on the table, either manually or by autovacuum. This issue is fixed in PostgreSQL Anonymizer 3.3.0 and later versions.","summary":"PostgreSQL Anonymizer's static masking leaves statistics about the original data visible in pg_stats until ANALYZE runs on the table, either manually or through autovacuum. An attacker with read access to pg_stats can infer properties of the unmasked values.","severity":"medium","cvss":4.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["data-privacy","database","package","postgresql"],"not_affected_if":["extension-not-installed","fixed-version","no-static-masking"],"how_to_check":"- Run `SELECT extversion FROM pg_extension WHERE extname = 'anon';` in each database and compare against the fixed version.\n- Check whether static masking is used on tables, for example with `SELECT * FROM anon.pg_static_masking` or the `anon.anonymize_table` workflow, per the project docs.","fix":"- Upgrade PostgreSQL Anonymizer to `3.3.0` or later.\n- Run `ANALYZE` on statically masked tables after upgrading so pg_stats reflects masked data.","status":"open","published_at":"2026-10-28T18:17:05+00:00","first_seen_at":"2026-10-28T18:34:32+00:00","triaged_at":"2026-10-28T18:35:13+00:00","updated_at":"2026-10-28T18:35:13+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-28T18:35:13Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade PostgreSQL Anonymizer to `3.3.0` or later.\n- Run `ANALYZE` on statically masked tables after upgrading so pg_stats reflects masked data.","reach":"local","title":"PostgreSQL Anonymizer: original data statistics leak through pg_stats after masking","impact":"low","summary":"PostgreSQL Anonymizer's static masking leaves statistics about the original data visible in pg_stats until ANALYZE runs on the table, either manually or through autovacuum. An attacker with read access to pg_stats can infer properties of the unmasked values.","category":"package","nicknames":[],"who_cares":["postgresql","database","data-privacy"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker reads statistics that reveal properties of original unmasked data","analyst_note":"","how_to_check":"- Run `SELECT extversion FROM pg_extension WHERE extname = 'anon';` in each database and compare against the fixed version.\n- Check whether static masking is used on tables, for example with `SELECT * FROM anon.pg_static_masking` or the `anon.anonymize_table` workflow, per the project docs.","needs_analyst":false,"not_affected_if":["extension-not-installed","fixed-version","no-static-masking"],"who_is_affected":"Teams that use PostgreSQL Anonymizer static masking to produce masked copies of databases, where the masked tables are readable by roles that can also query pg_stats. Systems that do not use the anon extension for static masking can skip it.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000621,"input_tokens":3330,"output_tokens":577,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-110183':14A,17A '-2026':13A,16A '3.3.0':109C 'access':54B 'analyz':40B,90C 'anonym':2A,25B,66C,108C 'attack':51B 'autovacuum':49B,101C 'contain':67C 'cve':12A,15A 'data':4A,19B,34B,82C 'data-privaci':18B 'databas':21B 'either':45B,97C 'fix':105C 'infer':59B 'issu':103C 'later':111C 'leak':6A 'leav':29B 'manual':46B,98C 'mask':11A,28B,73C 'oper':91C 'origin':3A,33B,81C 'packag':22B 'perform':93C 'persist':76C 'pertain':78C 'pg':8A,37B,56B,86C 'postgresql':1A,23B,24B,65C,107C 'privaci':20B 'properti':60B 'read':53B 'relat':70C 'remain':83C 'run':41B 'stat':9A,38B,57B,87C 'static':27B,72C 'statist':5A,30B,75C,77C 'tabl':44B,96C 'unmask':63B 'valu':64B 'version':112C 'visibl':35B,84C 'vulner':69C","nicknames":[],"mitigations":[],"who_affected":"Teams that use PostgreSQL Anonymizer static masking to produce masked copies of databases, where the masked tables are readable by roles that can also query pg_stats. Systems that do not use the anon extension for static masking can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T18:17:05+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cvss_by":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-110183","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110183","severity":null,"published_at":"2026-10-28T18:17:05+00:00","modified_at":"2026-10-28T18:17:05+00:00","first_seen_at":"2026-10-28T18:34:32+00:00","fetched_at":"2026-10-28T18:34:32+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}