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CVE-2026-19630

CVE-2026-19630

waiting for further signalsZero needs more public information before it can validate it.

EUVD-2026-107252 ↗

no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
ISC BIND 9 >= 9.11.0, <= 9.18.50; >= 9.20.0, <= 9.20.29; >= 9.21.0, <= 9.21.26; >= 9.11.3-S1, <= 9.18.50-S1; >= 9.20.9-S1, <= 9.20.29-S1
CWE-407 Inefficient Algorithmic Complexity
ETK-2026-2320Zero's internal tracking ID, independent of the CVE number., permanent identifier
cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
14msince last run
2h 02mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
trigger signal (cve.org) +0hwaiting for further signals+2h24m
0
+4h
+6h
+8h
+10h
+12h

description

ISC BIND 9 resolvers in the listed 9.11, 9.18, 9.20, and 9.21 release ranges are affected. An attacker able to send specially structured inbound DNS messages to a resolver can cause disproportionate CPU and memory use, potentially degrading resolver availability.

mitigation

Restrict inbound DNS traffic to trusted and necessary sources, particularly for resolver-facing interfaces. No fixed version is recorded; monitor ISC BIND updates and upgrade promptly when a corrected release is available.

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
–
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
2h 02m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-21 12:41Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

No artifact: an exploit or check was attempted but could not be produced at this moment.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-21 12:41Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-19630

this entry in the feed

GET /api/v1/feed/CVE-2026-19630

{
  "etk_id": "ETK-2026-2320",
  "cve_id": "CVE-2026-19630",
  "display_id": "CVE-2026-19630",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-107252",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Resource exhaustion in ISC BIND 9 DNS message processing",
  "summary": "ISC BIND 9 resolvers in the listed 9.11, 9.18, 9.20, and 9.21 release ranges are affected. An attacker able to send specially structured inbound DNS messages to a resolver can cause disproportionate CPU and memory use, potentially degrading resolver availability.",
  "mitigation": "Restrict inbound DNS traffic to trusted and necessary sources, particularly for resolver-facing interfaces. No fixed version is recorded; monitor ISC BIND updates and upgrade promptly when a corrected release is available.",
  "vendor": "ISC",
  "product": "BIND 9",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 9.11.0, <= 9.18.50",
        ">= 9.20.0, <= 9.20.29",
        ">= 9.21.0, <= 9.21.26",
        ">= 9.11.3-S1, <= 9.18.50-S1",
        ">= 9.20.9-S1, <= 9.20.29-S1"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "BIND 9",
      "purl": null
    }
  ],
  "cwes": [
    407
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 121.91845985,
  "t0_at": "2026-10-21T12:41:04.379000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-21T12:41:04.379000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-21T12:41:04.379000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-19630"
    }
  }
}

published 2026-10-21 13:02Z
last change 2026-10-21 15:05Z

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