MediumFix available
postgresql, postgresql13 and 2 more products — security advisory
A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.
- Products
- postgresql, postgresql13, postgresql14, postgresql15
- Affected versions
- Not specified
- Fixed versions
- 12.8-r0, 13.4-r0
- CVEs
- CVE-2021-3677
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:05 UTC · Revision 1
Source evidence
A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.
osv:ALPINE-CVE-2021-3677
postgresql
Fixed versions: 12.8-r0
postgresql
Fixed versions: 12.8-r0
postgresql
Fixed versions: 13.4-r0
postgresql
Fixed versions: 13.4-r0
postgresql13
Fixed versions: 13.4-r0
postgresql13
Fixed versions: 13.4-r0
postgresql14
Fixed versions: 13.4-r0
postgresql14
Fixed versions: 13.4-r0
postgresql14
Fixed versions: 13.4-r0
postgresql14
Fixed versions: 13.4-r0
postgresql15
Fixed versions: 13.4-r0
postgresql15
Fixed versions: 13.4-r0
postgresql15
Fixed versions: 13.4-r0
postgresql15
Fixed versions: 13.4-r0
Complete source record
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"severity": "medium",
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],
"modified": "2026-10-23T17:17:56.201592080Z",
"provider": "osv",
"upstream": [
"CVE-2021-3677"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2021-3677"
]
},
"related_cves": [
{
"value": "CVE-2021-3677",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415503,
"published_at": "2022-03-02T23:15:08.9+00:00"
}