CVE-2026-123575 (GCVE-0-2026-123575)

Vulnerability from cvelistv5 – Published: 2026-11-08 01:38 – Updated: 2026-11-08 01:38
VLAI
Title
Hickory DNS before 0.26.2 DoH Memory Exhaustion via Incomplete Request Bodies
Summary
Hickory DNS before 0.26.2 contains a resource exhaustion vulnerability in its DNS-over-HTTPS HTTP/2 server that lacks sufficient timeouts or limits for incomplete request bodies. Remote attackers can open DoH connections, send incomplete request bodies, and hold connections open to exhaust server memory.
Severity
8.7 (High)
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
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
hickory-dns hickory-dns Affected: 0 , < 0.26.2 (semver)
Unaffected: 0.26.2 (semver)
Create a notification for this product.
Date Public
2026-09-03 00:00
Show details on NVD website
To clipboard 

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          "packageURL": "pkg:cargo/hickory-dns",
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            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
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            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
            "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",
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            "vulnIntegrityImpact": "NONE"
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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      "providerMetadata": {
        "dateUpdated": "2026-11-08T01:38:11.288Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-g5xf-qv55-wv37)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-g5xf-qv55-wv37"
        },
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          "name": "VulnCheck Advisory: Hickory DNS before 0.26.2 DoH Memory Exhaustion via Incomplete Request Bodies",
          "tags": [
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          "url": "https://www.vulncheck.com/advisories/hickory-dns-before-0.26.2-doh-memory-exhaustion-via-incomplete-request-bodies"
        }
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      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-123575",
    "datePublished": "2026-11-08T01:38:11.288Z",
    "dateReserved": "2026-11-06T00:55:55.660Z",
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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}



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