Low
Deterred spoofing attempts can lead to authoritative servers being marked unavailable
Type: advisorySources: OSV
Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-26437
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 01:25 UTC · Revision 1
Source evidence
Deterred spoofing attempts can lead to authoritative servers being marked unavailable
core-osv · Original sourcePublished 4 Apr 2023, 14:37 UTC
Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.
osv:CVE-2023-26437
Complete source record
{
"id": "25dfa2a9a916ecac0e0d2f1dc27608fa11779ee80ef50716e91240558dd180a1",
"url": "https://osv.dev/vulnerability/CVE-2023-26437",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Deterred spoofing attempts can lead to authoritative servers being marked unavailable",
"summary": "Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.",
"evidence": "osv:CVE-2023-26437",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2023-26437",
"aliases": [
"CVE-2023-26437"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/powerdns/pdns",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "cbbfb4f0012eae11d015a5982e53601ac523fa90"
},
{
"introduced": "677a4e8ea8f791d27d2a75c1f3e6486dff11e22f"
},
{
"fixed": "21b255f57931de7c69a0c3b7f4e7e0adb7f50dc3"
},
{
"introduced": "84bc8944539bb9082312c703fb19775ffabc79f9"
},
{
"fixed": "566ad636d52331435705fb3a9c876966e53a4d9d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.6.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.7.0"
},
{
"fixed": "4.7.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.8.0"
},
{
"fixed": "4.8.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"rec-4.6.5",
"rec-4.8.3",
"rec-4.8.2",
"rec-4.8.0",
"rec-4.7.4",
"rec-4.6.4",
"rec-4.7.3",
"rec-4.7.2",
"rec-4.6.3",
"rec-4.7.1",
"rec-4.7.0",
"rec-4.6.2",
"rec-4.6.0",
"rec-4.6.0-rc1",
"rec-4.6.0-beta2",
"dnsdist-1.7.0-beta1",
"rec-4.6.0-beta1",
"rec-4.6.0-alpha2",
"dnsdist-1.7.0-alpha2",
"auth-4.6.0-alpha1",
"rec-4.6.0-alpha1",
"dnsdist-1.7.0-alpha1",
"auth-4.5.0-beta1",
"auth-4.6.0-alpha0",
"dnsdist-1.6.0",
"auth-4.5.0-alpha1",
"dnsdist-1.7.0-alpha0",
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"dnsdist-1.6.0-rc1",
"rec-4.6.0-alpha0",
"dnsdist-1.6.0-alpha3",
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"rec-4.5.0-alpha3",
"rec-4.5.0-alpha2",
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"dnsdist-1.6.0-alpha1",
"rec-4.5.0-alpha1",
"auth-4.5.0-alpha0",
"auth-4.4.0-beta1",
"dnsdist-1.6.0-alpha0",
"auth-4.4.0-alpha3",
"auth-4.4.0-alpha2",
"auth-4.4.0-alpha1",
"dnsdist-1.5.0",
"rec-4.5.0-alpha0",
"rec-4.4.0-beta1",
"rec-4.4.0-alpha2",
"dnsdist-1.5.0-rc4",
"dnsdist-1.5.0-rc3",
"dnsdist-1.5.0-rc2",
"rec-4.4.0-alpha1",
"dnsdist-1.5.0-rc1",
"dnsdist-1.5.0-alpha1",
"auth-4.3.0-beta2",
"rec-4.4.0-alpha0",
"auth-4.4.0-alpha0",
"auth-4.3.0-beta1",
"rec-4.3.0-beta1",
"auth-4.3.0-alpha1",
"dnsdist-1.4.0",
"dnsdist-1.4.0-rc5",
"rec-4.3.0-alpha3",
"rec-4.3.0-alpha2",
"dnsdist-1.4.0-rc4",
"dnsdist-1.4.0-rc3",
"rec-4.3.0-alpha1",
"dnsdist-1.4.0-rc2",
"dnsdist-1.4.0-rc1",
"auth-4.2.0-rc2",
"dnsdist-1.4.0-beta1",
"rec-4.2.0-rc1",
"rec-4.2.0-beta1",
"dnsdist-1.4.0-alpha2",
"dnsdist-1.4.0-alpha1",
"auth-4.2.0-rc1",
"dnsdist-1.3.3",
"auth-4.2.0-beta1",
"rec-4.2.0-alpha1",
"auth-4.2.0-alpha1",
"dnsdist-1.3.2",
"dnsdist-1.3.1",
"dnsdist-1.3.0",
"dnsdist-1.2.0",
"auth-4.1.0",
"rec-4.1.0",
"rec-4.1.0-rc3",
"auth-4.1.0-rc3",
"auth-4.1.0-rc2",
"rec-4.1.0-rc2",
"rec-4.1.0-rc1",
"auth-4.1.0-rc1",
"rec-4.1.0-alpha1",
"dnsdist-1.1.0",
"dnsdist-1.1.0-beta2",
"dnsdist-1.1.0-beta1",
"rec-4.0.2",
"rec-4.0.1",
"auth-4.0.1",
"rec-4.0.0",
"auth-4.0.0",
"auth-4.0.0-rc1",
"auth-4.0.0-rc2",
"rec-4.0.0-rc1",
"rec-4.0.0-beta1",
"auth-4.0.0-beta1",
"auth-4.0.0-alpha3",
"rec-4.0.0-alpha3",
"dnsdist-1.0.0",
"dnsdist-1.0.0-beta1",
"rec-4.0.0-alpha2",
"auth-4.0.0-alpha2",
"dnsdist-1.0.0-alpha2",
"auth-4.0.0-alpha1",
"rec-4.0.0-alpha1",
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"auth-3.4.0",
"auth-3.4.0-rc2",
"rec-3.6.0",
"auth-3.4.0-rc1",
"rec-3.5",
"rec-3.5-rc5",
"rec-3.5-rc4",
"rec-3.5-rc3",
"rec-3.5-rc1",
"auth-3.2-rc4",
"auth-3.2-rc3",
"auth-3.2-rc2",
"auth-3.2-rc1",
"auth-3.1-rc3",
"auth-3.1-rc2",
"auth-3.1-rc1",
"rec-3.3.1",
"rec-3.1.4",
"rec-3.0.1",
"rec-3-0-1",
"rec-3.0",
"rec-3-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-26437.json"
}
}
],
"modified": "2026-10-28T02:30:52.330418783Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/",
"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/",
"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26437.json",
"https://nvd.nist.gov/vuln/detail/CVE-2023-26437"
],
"provider_metadata": {
"cna_assigner": "OX",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"last_affected": "4.6.5"
},
{
"last_affected": "4.7.4"
},
{
"last_affected": "4.8.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26437.json"
}
},
"related_cves": [
{
"value": "CVE-2023-26437",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 521324,
"published_at": "2023-04-04T14:37:29.388+00:00"
}