Vulnerability-Lookup

CVE-2026-52684 (GCVE-0-2026-52684)

Vulnerability from cvelistv5 – Published: 2026-07-23 07:49 – Updated: 2026-07-23 14:00

Title

Prefetch Feature Allows Persistent Ghost Domain Cache Poisoning Attack

Summary

If the auth responds very slowly and the records expire in between, the capping of TTLs is not enforced for lack of data. This does not happen on regular resolve as then then the child records are used immediately if not expired and thus valid, or the records are expired, and in that case not used. So this case can only happen if almost expired records are used to refresh the authoritative NS records.

Severity

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

References

1 reference

URL	Tags
https://github.com/PowerDNS/pdns/pull/17748

Impacted products

1 product

Vendor	Product	Version
PowerDNS	Recursor	Affected: 0.0.0 , < 5.5.0 (semver)

Date Public

2026-07-19 22:00

Credits

Taofei Guo, Peking University. Qi Wang and JianJun Chen and Haixin Duan, Tsinghua University.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-52684

Vulnerability from fkie_nvd - Published: 2026-07-23 09:16 - Updated: 2026-07-23 09:16

Severity

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security@open-xchange.com	https://github.com/PowerDNS/pdns/pull/17748

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected",
          "modules": [
            "Packet cache",
            "Record cache"
          ],
          "packageName": "pdns-recursor",
          "product": "Recursor",
          "programFiles": [
            "rec-packetcache.cc",
            "recursor_cache.cc"
          ],
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "versions": [
            {
              "lessThan": "5.5.0",
              "status": "affected",
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              "versionType": "semver"
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        }
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      "source": "security@open-xchange.com"
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    }
  ],
  "id": "CVE-2026-52684",
  "lastModified": "2026-07-23T09:16:26.843",
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GHSA-J58F-RGM2-V2P8

Vulnerability from github – Published: 2026-07-23 09:32 – Updated: 2026-07-23 09:32

Details

Severity

3.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-52684"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-23T09:16:26Z",
    "severity": "LOW"
  },
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  "id": "GHSA-j58f-rgm2-v2p8",
  "modified": "2026-07-23T09:32:01Z",
  "published": "2026-07-23T09:32:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52684"
    },
    {
      "type": "WEB",
      "url": "https://github.com/PowerDNS/pdns/pull/17748"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-52684 (GCVE-0-2026-52684)

FKIE_CVE-2026-52684

GHSA-J58F-RGM2-V2P8

Tags

Sightings

Nomenclature