Observable response discrepancy in PostgreSQL SCRAM authentication allows an unauthenticated user to test the existence of a user via observing the SCRAM iteration count. This requires the probed user to have a non-default scram_iterations count, because the authentication challenge for a nonexistent user reports the default scram_iterations. Within major versions 16-18, minor versions before PostgreSQL 18.5, 17.11, and 16.15 are affected. Versions before PostgreSQL 16 are unaffected.
CVSS Details
- CVSS 3.1 Base Score: 5.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade postgresql15Upgrade postgresql18Upgrade postgresql16Upgrade postgresql17 | Aug 17, 2026 | Aug 13, 2026 |
| Amazon_linux_2023 | — | Upgrade postgresql17-private-develUpgrade postgresql18-test-rpm-macrosUpgrade postgresql17-debugsourceUpgrade postgresql16-private-develUpgrade postgresql16-private-libsUpgrade postgresql18-upgrade-develUpgrade postgresql16-contrib-debuginfoUpgrade postgresql17-pltcl-debuginfoUpgrade postgresql16-plperl-debuginfoUpgrade postgresql18-llvmjitUpgrade postgresql18-plperlUpgrade postgresql17-contrib-debuginfoUpgrade postgresql17-plpython3-debuginfoUpgrade postgresql16-llvmjitUpgrade postgresql18-debugsourceUpgrade postgresql17-private-libs-debuginfoUpgrade postgresql18-staticUpgrade postgresql17-private-libsUpgrade postgresql18Upgrade postgresql17-llvmjit-debuginfoUpgrade postgresql17-server-debuginfoUpgrade postgresql16-debugsourceUpgrade postgresql16-testUpgrade postgresql18-upgrade-debuginfoUpgrade postgresql17-debuginfoUpgrade postgresql17-test-debuginfoUpgrade postgresql17-test-rpm-macrosUpgrade postgresql17-upgrade-develUpgrade postgresql18-private-libs-debuginfoUpgrade postgresql17-server-devel-debuginfoUpgrade postgresql17-plperl-debuginfoUpgrade postgresql18-contribUpgrade postgresql18-docsUpgrade postgresql18-plpython3Upgrade postgresql18-plpython3-debuginfoUpgrade postgresql18-testUpgrade postgresql16-debuginfoUpgrade postgresql16-pltclUpgrade postgresql17-server-develUpgrade postgresql17-upgradeUpgrade postgresql18-plperl-debuginfoUpgrade postgresql18-pltcl-debuginfoUpgrade postgresql18-test-debuginfoUpgrade postgresql17-plperlUpgrade postgresql16-server-develUpgrade postgresql16-docs-debuginfoUpgrade postgresql16-server-devel-debuginfoUpgrade postgresql16-plpython3-debuginfoUpgrade postgresql16-pltcl-debuginfoUpgrade postgresql16-test-rpm-macrosUpgrade postgresql16-private-libs-debuginfoUpgrade postgresql16-staticUpgrade postgresql16-contribUpgrade postgresql18-private-develUpgrade postgresql16-plpython3Upgrade postgresql18-private-libsUpgrade postgresql17-docsUpgrade postgresql16-upgrade-devel-debuginfoUpgrade postgresql16-upgrade-develUpgrade postgresql18-pltclUpgrade postgresql17-serverUpgrade postgresql16-upgradeUpgrade postgresql18-server-devel-debuginfoUpgrade postgresql18-debuginfoUpgrade postgresql17-upgrade-devel-debuginfoUpgrade postgresql18-upgrade-devel-debuginfoUpgrade postgresql18-upgradeUpgrade postgresql17Upgrade postgresql16-server-debuginfoUpgrade postgresql17-testUpgrade postgresql18-server-debuginfoUpgrade postgresql18-llvmjit-debuginfoUpgrade postgresql16-upgrade-debuginfoUpgrade postgresql16-plperlUpgrade postgresql17-contribUpgrade postgresql16-docsUpgrade postgresql17-upgrade-debuginfoUpgrade postgresql17-docs-debuginfoUpgrade postgresql18-docs-debuginfoUpgrade postgresql18-contrib-debuginfoUpgrade postgresql17-plpython3Upgrade postgresql17-llvmjitUpgrade postgresql16Upgrade postgresql18-serverUpgrade postgresql17-pltclUpgrade postgresql16-test-debuginfoUpgrade postgresql16-serverUpgrade postgresql18-server-develUpgrade postgresql17-staticUpgrade postgresql16-llvmjit-debuginfo | Sep 1, 2026 | Aug 13, 2026 |
| Debian | — | Upgrade postgresql-17 | Aug 16, 2026 | Aug 16, 2026 |
| Freebsd | — | Upgrade postgresql14-serverUpgrade postgresql15-serverUpgrade postgresql18-serverUpgrade postgresql16-serverUpgrade postgresql17-server | Aug 17, 2026 | Aug 16, 2026 |
| Postgres | — | Upgrade to PostgreSQL version 17.11Upgrade to PostgreSQL version 16.15Upgrade to PostgreSQL version 18.6 | Aug 14, 2026 | Aug 13, 2026 |
| Redhat_linux | — | No solution exists | Sep 2, 2026 | Aug 13, 2026 |
| Ubuntu | — | Upgrade postgresql-16Upgrade postgresql-18Upgrade postgresql-14 | Aug 20, 2026 | Aug 13, 2026 |
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