{"id":"ALPINE-CVE-2026-6638","details":"SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials.  The attack takes effect at the next REFRESH PUBLICATION.  Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected.  Versions before PostgreSQL 16 are unaffected.","modified":"2026-09-14T16:18:08.257856583Z","published":"2026-05-14T14:16:25.937Z","upstream":["CVE-2026-6638"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2026-6638"}],"affected":[{"package":{"name":"postgresql16","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/postgresql16?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.14-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql16","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/postgresql16?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.14-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql16","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/postgresql16?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.14-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql17","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/postgresql17?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"17.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql17","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/postgresql17?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"17.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql17","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/postgresql17?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"17.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql17","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/postgresql17?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"17.10-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql18","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/postgresql18?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}},{"package":{"name":"postgresql18","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/postgresql18?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6638.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}