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CVE-2026-107336

Status: Awaiting AnalysisMedium (6.5)—

Malcolm's front nginx reverse proxy defines a "Dashboards → Arkime shortcut" location using a case-insensitive regex matcher but a case-sensitive rewrite. A request whose path segment is not exact-lowercase (for example /IDDASH2ARK/...) enters the location (the matcher fires) but evades the rewrite (no redirect is issued), so nginx falls through to the location's proxy_pass to the Arkime backend. That location is the one proxied location in the shipped config that does not include the per-location authentication file, so the request reaches Arkime unauthenticated.

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The same location also forwards a client-supplied X-Forwarded-User header un-overwritten, and Arkime is configured to trust X-Forwarded-User as the authenticated username — so an unauthenticated network caller can reach the Arkime backend while supplying a forged, auto-provisioned identity.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector CVSS AV:N/AC:L/PR:N indica explotación remota sin privilegios (T1190). Omisión de autenticación por regex case-insensitive permite acceso no autenticado con identidad falsa (T1078) y exposición de datos del backend Arkime (T1552) mediante proxy sin control de acceso.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account ManagementActive Directory ConfigurationUser TrainingPassword PoliciesLimit Access to Resource Over NetworkFilter Network Traffic

Affected technologies (2)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Arkime — ArkimeAIMalcolm — MalcolmAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-107336",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-107336",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-10-08T19:07:14.526487Z"
        }
      }
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    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "ics-cert@hq.dhs.gov",
        "cvssData": {
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          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "CISA",
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          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "26.07.1"
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            {
              "status": "unaffected",
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  "published": "2026-10-08T18:17:20.177",
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      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-7j32-cf27-cp6h",
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Malcolm's front nginx reverse proxy defines a \"Dashboards → Arkime shortcut\" location using a case-insensitive regex matcher but a case-sensitive rewrite. A request whose path segment is not exact-lowercase (for example /IDDASH2ARK/...) enters the location (the matcher fires) but evades the rewrite (no redirect is issued), so nginx falls through to the location's proxy_pass to the Arkime backend. That location is the one proxied location in the shipped config that does not include the per-location authentication file, so the request reaches Arkime unauthenticated. The same location also forwards a client-supplied X-Forwarded-User header un-overwritten, and Arkime is configured to trust X-Forwarded-User as the authenticated username — so an unauthenticated network caller can reach the Arkime backend while supplying a forged, auto-provisioned identity."
    }
  ],
  "lastModified": "2026-10-08T21:03:43.847",
  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}