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 postgresql17Upgrade postgresql16Upgrade postgresql18Upgrade postgresql15 | Aug 17, 2026 | Aug 13, 2026 |
| Amazon_linux_2023 | — | Upgrade postgresql18-plperlUpgrade postgresql18-llvmjitUpgrade postgresql17-private-libs-debuginfoUpgrade postgresql16-private-libsUpgrade postgresql16-llvmjitUpgrade postgresql16-private-develUpgrade postgresql17-pltcl-debuginfoUpgrade postgresql17-contrib-debuginfoUpgrade postgresql17-private-develUpgrade postgresql16-testUpgrade postgresql18-test-rpm-macrosUpgrade postgresql17-debugsourceUpgrade postgresql17-private-libsUpgrade postgresql18-upgrade-develUpgrade postgresql18Upgrade postgresql16-contrib-debuginfoUpgrade postgresql16-plperl-debuginfoUpgrade postgresql17-debuginfoUpgrade postgresql17-llvmjit-debuginfoUpgrade postgresql17-plperlUpgrade postgresql16-server-devel-debuginfoUpgrade postgresql16-plpython3-debuginfoUpgrade postgresql16-pltcl-debuginfoUpgrade postgresql16-server-develUpgrade postgresql16-pltclUpgrade postgresql17-server-develUpgrade postgresql18-test-debuginfoUpgrade postgresql16-docs-debuginfoUpgrade postgresql18-pltcl-debuginfoUpgrade postgresql16-test-rpm-macrosUpgrade postgresql18-contribUpgrade postgresql18-plpython3Upgrade postgresql18-testUpgrade postgresql16-debuginfoUpgrade postgresql16-debugsourceUpgrade postgresql18-docsUpgrade postgresql18-plpython3-debuginfoUpgrade postgresql17-plperl-debuginfoUpgrade postgresql18-debugsourceUpgrade postgresql18-private-libs-debuginfoUpgrade postgresql17-server-debuginfoUpgrade postgresql18-staticUpgrade postgresql17-upgrade-develUpgrade postgresql17-plpython3-debuginfoUpgrade postgresql18-upgrade-debuginfoUpgrade postgresql17-upgradeUpgrade postgresql17-server-devel-debuginfoUpgrade postgresql17-test-debuginfoUpgrade postgresql17-test-rpm-macrosUpgrade postgresql18-plperl-debuginfoUpgrade postgresql16-private-libs-debuginfoUpgrade postgresql17-serverUpgrade postgresql16-upgrade-devel-debuginfoUpgrade postgresql16-contribUpgrade postgresql17Upgrade postgresql17-testUpgrade postgresql18-upgradeUpgrade postgresql16-server-debuginfoUpgrade postgresql18-pltclUpgrade postgresql16-plpython3Upgrade postgresql18-upgrade-devel-debuginfoUpgrade postgresql16-llvmjit-debuginfoUpgrade postgresql18-server-develUpgrade postgresql17-staticUpgrade postgresql18-llvmjit-debuginfoUpgrade postgresql17-upgrade-debuginfoUpgrade postgresql17-contribUpgrade postgresql17-llvmjitUpgrade postgresql18-contrib-debuginfoUpgrade postgresql18-docs-debuginfoUpgrade postgresql17-plpython3Upgrade postgresql16-plperlUpgrade postgresql18-server-debuginfoUpgrade postgresql17-docs-debuginfoUpgrade postgresql16-docsUpgrade postgresql16-upgrade-debuginfoUpgrade postgresql18-private-develUpgrade postgresql18-serverUpgrade postgresql16-test-debuginfoUpgrade postgresql16-serverUpgrade postgresql17-pltclUpgrade postgresql18-debuginfoUpgrade postgresql16-upgradeUpgrade postgresql18-server-devel-debuginfoUpgrade postgresql17-upgrade-devel-debuginfoUpgrade postgresql16Upgrade postgresql18-private-libsUpgrade postgresql17-docsUpgrade postgresql16-upgrade-develUpgrade postgresql16-static | Sep 1, 2026 | Aug 13, 2026 |
| Debian | — | Upgrade postgresql-17 | Aug 16, 2026 | Aug 16, 2026 |
| Freebsd | — | Upgrade postgresql18-serverUpgrade postgresql17-serverUpgrade postgresql15-serverUpgrade postgresql16-serverUpgrade postgresql14-server | Aug 17, 2026 | Aug 16, 2026 |
| Postgres | — | Upgrade to PostgreSQL version 16.15Upgrade to PostgreSQL version 18.6Upgrade to PostgreSQL version 17.11 | Aug 14, 2026 | Aug 13, 2026 |
| Redhat_linux | — | No solution exists | Sep 2, 2026 | Aug 13, 2026 |
| Ubuntu | — | Upgrade postgresql-16Upgrade postgresql-14Upgrade postgresql-18 | Aug 20, 2026 | Aug 13, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub