CVE-2026-78403

validatingZero is analyzing and reversing it now.

GHSA-fxcq-q77c-fh3w ↗EUVD-2026-114364 ↗

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.
Thalesgroup Sentinel Keys Server < 1.3.8.0
fixed in 1.3.8.0
CWE-121 Stack-based Buffer Overflow
ETK-2026-3108Zero's internal tracking ID, independent of the CVE number., permanent identifier
–running
startingcurrent stage
timeline
0 = cve.org publication
trigger signal (cve.org) +0h
0
+2h
+4h
+6h
+8h
+10h
+12h

description

Windows installations of Sentinel Keys Server before version 1.3.8.0 are affected. An unauthenticated remote attacker who can reach the HTTP service may be able to execute code with SYSTEM privileges.

Still under analysis: more detail becomes available as the pipeline runs.

mitigation

Upgrade Sentinel Keys Server to version 1.3.8.0 or later. Until upgraded, restrict access to its HTTP service to trusted hosts and networks.

fixed in 1.3.8.0

check
building now
exploit
not yet
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
17m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-30 19:12Z
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

Run in progress: no artifact yet.

source signals

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

  1. 2026-10-30 19:12Z
    cve_org: trigger signal, started the run

this entry in the feed

GET /api/v1/feed/CVE-2026-78403

{
  "etk_id": "ETK-2026-3108",
  "cve_id": "CVE-2026-78403",
  "display_id": "CVE-2026-78403",
  "ghsa_id": "GHSA-fxcq-q77c-fh3w",
  "euvd_id": "EUVD-2026-114364",
  "status": "in_pipeline",
  "anchor_state": "anchored",
  "title": "Stack-based buffer overflow in Sentinel Keys Server",
  "summary": "Windows installations of Sentinel Keys Server before version 1.3.8.0 are affected. An unauthenticated remote attacker who can reach the HTTP service may be able to execute code with SYSTEM privileges.",
  "mitigation": "Upgrade Sentinel Keys Server to version 1.3.8.0 or later. Until upgraded, restrict access to its HTTP service to trusted hosts and networks.",
  "vendor": "Thalesgroup",
  "product": "Sentinel Keys Server",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 1.3.8.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.3.8.0"
      ],
      "package_name": "Sentinel Keys Server",
      "purl": null
    }
  ],
  "cwes": [
    121
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 17.055755166666668,
  "t0_at": "2026-10-30T19:12:56.080000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-30T19:12:56.080000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-30T19:12:56.080000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-78403"
    }
  }
}

published 2026-10-30 19:55Z
last change 2026-10-31 22:50Z

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