ubuntu-cve-2026-14672
Vulnerability from osv_ubuntu
Published
2026-08-13 13:17
Modified
2026-08-20 19:44
Summary
Details
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.
Severity
5.3 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libecpg-compat3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "libecpg6",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "libpgtypes3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "libpq5",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-client-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-contrib-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-doc-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-plperl-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-plpython-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-plpython3-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-pltcl-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
},
{
"binary_name": "postgresql-server-dev-9.3",
"binary_version": "9.3.24-0ubuntu0.14.04+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "postgresql-9.3",
"purl": "pkg:deb/ubuntu/postgresql-9.3@9.3.24-0ubuntu0.14.04+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.3.1-1",
"9.3.2-1",
"9.3.2-1ubuntu1",
"9.3.2-1ubuntu2",
"9.3.3-1",
"9.3.3-1bzr1",
"9.3.3-1bzr2",
"9.3.4-1",
"9.3.5-0ubuntu0.14.04.1",
"9.3.6-0ubuntu0.14.04",
"9.3.7-0ubuntu0.14.04",
"9.3.8-0ubuntu0.4.04",
"9.3.9-0ubuntu0.14.04",
"9.3.10-0ubuntu0.14.04",
"9.3.11-0ubuntu0.14.04",
"9.3.12-0ubuntu0.14.04",
"9.3.13-0ubuntu0.14.04",
"9.3.14-0ubuntu0.14.04",
"9.3.15-0ubuntu0.14.04",
"9.3.16-0ubuntu0.14.04",
"9.3.17-0ubuntu0.14.04",
"9.3.18-0ubuntu0.14.04.1",
"9.3.19-0ubuntu0.14.04",
"9.3.20-0ubuntu0.14.04",
"9.3.21-0ubuntu0.14.04",
"9.3.22-0ubuntu0.14.04",
"9.3.23-0ubuntu0.14.04",
"9.3.24-0ubuntu0.14.04",
"9.3.24-0ubuntu0.14.04+esm1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libecpg-compat3",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "libecpg6",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "libpgtypes3",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "libpq5",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-client-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-doc-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-plperl-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-plpython3-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-pltcl-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
},
{
"binary_name": "postgresql-server-dev-16",
"binary_version": "16.15-0ubuntu0.24.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "postgresql-16",
"purl": "pkg:deb/ubuntu/postgresql-16@16.15-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "16.15-0ubuntu0.24.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"16.0-2",
"16.1-1",
"16.1-1build1",
"16.1-1build3",
"16.2-1",
"16.2-1ubuntu2",
"16.2-1ubuntu3",
"16.2-1ubuntu4",
"16.3-0ubuntu0.24.04.1",
"16.4-0ubuntu0.24.04.1",
"16.4-0ubuntu0.24.04.2",
"16.6-0ubuntu0.24.04.1",
"16.8-0ubuntu0.24.04.1",
"16.9-0ubuntu0.24.04.1",
"16.10-0ubuntu0.24.04.1",
"16.11-0ubuntu0.24.04.1",
"16.13-0ubuntu0.24.04.1",
"16.14-0ubuntu0.24.04.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libecpg-compat3",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "libecpg6",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "libpgtypes3",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "libpq-oauth",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "libpq5",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-18-jit",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-client-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-doc-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-plperl-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-plpython3-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-pltcl-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
},
{
"binary_name": "postgresql-server-dev-18",
"binary_version": "18.6-0ubuntu0.26.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "postgresql-18",
"purl": "pkg:deb/ubuntu/postgresql-18@18.6-0ubuntu0.26.04.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "18.6-0ubuntu0.26.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"18.0-1",
"18.1-1",
"18.1-1ubuntu1",
"18.1-1ubuntu2",
"18.1-2",
"18.3-1",
"18.4-0ubuntu0.26.04.1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-14672",
"modified": "2026-08-20T19:44:06Z",
"published": "2026-08-13T13:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-14672"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-14672"
},
{
"type": "REPORT",
"url": "https://www.postgresql.org/support/security/CVE-2026-14672/"
},
{
"type": "REPORT",
"url": "https://www.postgresql.org/about/news/postgresql-186-1711-1615-1519-1424-and-19-beta-3-released-3365/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8653-1"
}
],
"related": [
"USN-8653-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-14672"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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