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vuln-cve/data/2026/16xxx/CVE-2026-16240.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-16240",
"assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
"state": "PUBLISHED",
"assignerShortName": "PostgreSQL",
"dateReserved": "2026-07-20T01:55:33.940Z",
"datePublished": "2026-11-12T14:15:31.280Z",
"dateUpdated": "2026-11-12T21:41:47.325Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
"shortName": "PostgreSQL",
"dateUpdated": "2026-11-12T14:15:31.280Z"
},
"title": "PostgreSQL pg_basebackup can use backup manifest content as a format string",
"x_postgresql": {
"component": "client"
},
"descriptions": [
{
"lang": "en",
"value": "Use of externally-controlled format string in PostgreSQL pg_basebackup allows an attacker having already compromised a server to achieve disclosure from pg_basebackup memory, via backup manifest bytes. The vulnerability does not return the improperly-read bytes back to the attacker's server, so a successful attack would need separate implementation-specific secrets for that. Integrity impact is unlikely; in particular, the applicable formatter does not support %n. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected."
}
],
"affected": [
{
"defaultStatus": "unaffected",
"product": "PostgreSQL",
"vendor": "n/a",
"versions": [
{
"lessThan": "18.7",
"status": "affected",
"version": "18",
"versionType": "rpm"
},
{
"lessThan": "17.12",
"status": "affected",
"version": "17",
"versionType": "rpm"
},
{
"lessThan": "16.16",
"status": "affected",
"version": "16",
"versionType": "rpm"
},
{
"lessThan": "15.20",
"status": "affected",
"version": "15",
"versionType": "rpm"
},
{
"lessThan": "14.25",
"status": "affected",
"version": "0",
"versionType": "rpm"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-134",
"type": "CWE",
"description": "Use of Externally-Controlled Format String"
}
]
}
],
"references": [
{
"url": "https://www.postgresql.org/support/security/CVE-2026-16240/"
}
],
"metrics": [
{
"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
"baseScore": 3.7,
"baseSeverity": "LOW"
}
}
],
"configurations": [
{
"lang": "en",
"value": "attacker has compromised the server being backed up; attacker has a separate way to retrieve the improperly-read bytes from the host running pg_basebackup; victim runs a backup without starting the server from that backup"
}
],
"credits": [
{
"lang": "en",
"value": "The PostgreSQL project thanks Peter Eisentraut for reporting this problem."
}
]
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-11-12T21:10:07.723348Z",
"id": "CVE-2026-16240",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-11-12T21:41:47.325Z"
}
}
]
}
}