PostgreSQL observable response discrepancy with non-default scram_iterations provides user existence oracle
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
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| n/a | PostgreSQL | unaffected |
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Configuration 1 [-]
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No data.
| Vendor | Product | Versions | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Postgresql | Postgresql |
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| Source | ID | Title |
|---|---|---|
Debian DSA |
DSA-6438-1 | postgresql-17 security update |
Ubuntu USN |
USN-8653-1 | PostgreSQL vulnerabilities |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.394% probability within 30 days)
| Link | Providers |
|---|---|
| https://www.postgresql.org/support/security/CVE-2026-14672/ |
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| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | 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 18.6, 17.11, and 16.15 are affected. Versions before PostgreSQL 16 are unaffected. |
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Postgresql
Postgresql postgresql |
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| Vendors & Products |
Postgresql
Postgresql postgresql |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | PostgreSQL observable response discrepancy with non-default scram_iterations provides user existence oracle | |
| Weaknesses | CWE-204 | |
| References |
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| Metrics |
cvssV3_1
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