Bug 2515330 (CVE-2026-14672) - CVE-2026-14672 postgresql: PostgreSQL: User existence oracle in SCRAM authentication
Summary: CVE-2026-14672 postgresql: PostgreSQL: User existence oracle in SCRAM authent...
Keywords:
Status: NEW
Alias: CVE-2026-14672
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On: 2526653 2526654
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-13 13:31 UTC by OSIDB Bzimport
Modified: 2026-09-01 06:11 UTC (History)
9 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-13 13:31:59 UTC 
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.
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