CVE-2026-123606
📛 CVE Title
Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification
Description
The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote attackers can serve such referrals to force A and AAAA lookups per target, amplifying traffic against remote servers or exhausting recursor resources.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulnCheck
- CVSS severity
- HIGH
- CVSS score
- 8.7 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N- Effective score
- 8.7 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-400 - Reserved
- 2026-11-06
- Published
- 2026-11-08 01:38 UTC
- Last updated
- 2026-11-08 01:38 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123606.json
- Linked Threat
- CVE-2026-123606 — Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-119365
EUVD enrichment is queued; refresh the page in a few seconds.
Affected products (2)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| hickory-dns | hickory-dns |
0.25.0-alpha.3 (affected)
|
— |
| hickory-dns | hickory-dns |
0.26.0-alpha.1 (affected),
0.26.2 (unaffected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- GitHub Security Advisory (GHSA-6h5c-jjg5-wj59) vendor-advisory
- VulnCheck Advisory: Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification third-party-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:crimsondesert.pearlabyss.com
Here are the fixes and improvements that have been added this patch . The patch is rolling out across all platforms. Please refer to the Update section below to see the state of the patch for each platform. XBOX: Patch available at a later time (in-progress) Epic Games Store: Patch available at a ...
2026-11-08 10:22 UTC -
web:epatch.pa.gov
Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...
2026-11-08 10:22 UTC -
web:success.trendmicro.com
This article explains the impact of the vulnerabilities on TrendAI products and services and will be detailed with further mitigation and remediation information as it becomes available.
2026-11-08 10:22 UTC -
web:support.esri.com
The issues resolved by these patches are listed in the Issues addressed with this patch section below. As part of the patch installation, the ArcGIS Server service is stopped and restarted. The restart may take several minutes depending on the number of services published on the ArcGIS Server site. This patch can be uninstalled as outlined in the Uninstalling this patch on Windows and ...
2026-11-08 10:22 UTC -
web:trust.barracuda.com
Patches If a patch has not been automatically applied, customers should manually apply the appropriate patch as soon as possible. If customers have turned off automatic patching, Barracuda recommends setting devices to automatically receive patches. Guidance on how to manually apply the patch or update firmware can be found on Barracuda Campus.
2026-11-08 10:22 UTC -
web:www.beyondtrust.com
Mitigation As of Oct 9, 2026 , a patch that remediates this vulnerability has been applied to all Remote Support SaaS customers. Self-hosted customers of Remote Support should manually apply the patch if their instance is not subscribed to automatic updates in their / appliance interface.
2026-11-08 10:22 UTC -
web:www.cisa.gov
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework. Learn more about ...
2026-11-08 10:22 UTC -
web:www.cve.org
We're sorry but the CVE Website doesn't work properly without JavaScript enabled. Please enable it to continue.
2026-11-08 10:22 UTC -
web:www.oracle.com
Oracle Critical Patch Update Advisory - April 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch ...
2026-11-08 10:22 UTC -
web:www.oracle.com
This Critical Patch Update contains 337 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at January 2026 Critical Patch Update: Executive Summary and Analysis.
2026-11-08 10:22 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-123606.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:cargo/hickory-recursor",
"product": "hickory-dns",
"vendor": "hickory-dns",
"versions": [
{
"lessThanOrEqual": "0.25.2",
"status": "affected",
"version": "0.25.0-alpha.3",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:cargo/hickory-resolver",
"product": "hickory-dns",
"vendor": "hickory-dns",
"versions": [
{
"lessThan": "0.26.2",
"status": "affected",
"version": "0.26.0-alpha.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "0.26.2",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "qifan-sailboat"
}
],
"datePublic": "2026-09-03T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote attackers can serve such referrals to force A and AAAA lookups per target, amplifying traffic against remote servers or exhausting recursor resources."
}
],
"metrics": [
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"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS"
},
{
"cvssV3_1": {
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"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-08T01:38:32.727Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-6h5c-jjg5-wj59)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-6h5c-jjg5-wj59"
},
{
"name": "VulnCheck Advisory: Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/hickory-dns-recursor-0.25.0-alpha.3-through-0.25.2-glueless-ns-referral-amplification"
}
],
"title": "Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-123606",
"datePublished": "2026-11-08T01:38:32.727Z",
"dateReserved": "2026-11-06T01:02:39.794Z",
"dateUpdated": "2026-11-08T01:38:32.727Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}