FKIE_CVE-2026-66771

Vulnerability from fkie_nvd - Published: 2026-08-11 01:17 - Updated: 2026-08-11 15:17
Severity
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Summary
SAPUI5 allows a key user with content adaptation privileges to inject malicious script content into persisted application changes. When another user subsequently opens the adapted application, the injected script executes in the victim's browser session. Successful exploitation could allow the attacker to access sensitive session data and perform unauthorized actions on behalf of the victim, resulting in a high impact on confidentiality and integrity. There is no impact on availability.
References
cna@sap.comhttps://me.sap.com/notes/3772071
cna@sap.comhttps://url.sap/sapsecuritypatchday
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "SAPUI5",
          "vendor": "SAP_SE",
          "versions": [
            {
              "status": "affected",
              "version": "SAP_UI 750"
            },
            {
              "status": "affected",
              "version": "754"
            },
            {
              "status": "affected",
              "version": "755"
            },
            {
              "status": "affected",
              "version": "756"
            },
            {
              "status": "affected",
              "version": "757"
            },
            {
              "status": "affected",
              "version": "758"
            },
            {
              "status": "affected",
              "version": "816"
            },
            {
              "status": "affected",
              "version": "UI_700 200"
            }
          ]
        }
      ],
      "source": "cna@sap.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SAPUI5 allows a key user with content adaptation privileges to inject malicious script content into persisted application changes. When another user subsequently opens the adapted application, the injected script executes in the victim\u0027s browser session. Successful exploitation could allow the attacker to access sensitive session data and perform unauthorized actions on behalf of the victim, resulting in a high impact on confidentiality and integrity. There is no impact on availability."
    }
  ],
  "id": "CVE-2026-66771",
  "lastModified": "2026-08-11T15:17:33.500",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 5.2,
        "source": "cna@sap.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-66771",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-11T13:11:14.989435Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-11T01:17:23.407",
  "references": [
    {
      "source": "cna@sap.com",
      "url": "https://me.sap.com/notes/3772071"
    },
    {
      "source": "cna@sap.com",
      "url": "https://url.sap/sapsecuritypatchday"
    }
  ],
  "sourceIdentifier": "cna@sap.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "cna@sap.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.