CVE-2026-114463

{
  "id": "CVE-2026-114463",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-21T16:17:34.087",
  "lastModified": "2026-10-30T16:17:39.933",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The webhook platform gateway in Nous Research Hermes Agent versions builds the session chat_id as webhook:{route_name}:{delivery_id} and re-derives the authorizing route by splitting that string, so a route name containing a \":\" resolves toolset authorization to a different, higher-privileged prefix route than the one authenticated, which allows a remote attacker with the target HMAC to gain that higher-privileged route's toolsets."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Nous Research",
          "product": "Hermes Agent",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "2026.8.19",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-30T15:16:28.449619Z",
          "id": "CVE-2026-114463",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/NousResearch/hermes-agent/pull/115285",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/NousResearch/hermes-agent/releases/tag/v0.22.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pinarsadioglu/security-advisories/blob/main/webhook-route-authz-bypass.md",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pinarsadioglu/security-advisories/blob/main/webhook-route-authz-bypass.md",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}