CVE-2026-103866 (GCVE-0-2026-103866)

Vulnerability from cvelistv5 – Published: 2026-11-05 12:33 – Updated: 2026-11-05 22:05
VLAI
Title
Apache Sling Engine: Hand-rolled parameter parser diverges from RFC/container parsing, enabling smuggling
Summary
Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Apache Sling Engine. The engine's query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors. This issue affects Apache Sling Engine: before 3.0.4. Users are recommended to upgrade to version 3.0.4, which fixes the issue.
Severity
No CVSS data available.
CWE
  • CWE-436
  • CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1170 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Sling Engine Affected: 0 , < 3.0.4 (semver)
guessed Create a notification for this product.
Credits
The Apache Software Foundation Claude Code
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-11-05T22:05:44.167Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/11/05/8"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Sling Engine",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.0.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "The Apache Software Foundation"
        },
        {
          "lang": "en",
          "type": "tool",
          "value": "Claude Code"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eInconsistent interpretation of HTTP requests (\u0027HTTP Request/Response smuggling\u0027) vulnerability in Apache Sling Engine.\u0026nbsp;The engine\u0027s query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Sling Engine: before 3.0.4.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 3.0.4, which fixes the issue.\u003c/p\u003e"
            }
          ],
          "value": "Inconsistent interpretation of HTTP requests (\u0027HTTP Request/Response smuggling\u0027) vulnerability in Apache Sling Engine.\u00a0The engine\u0027s query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-436",
              "description": "CWE-436",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444 Inconsistent interpretation of HTTP requests (\u0027HTTP Request/Response smuggling\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T12:33:00.994Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread.html/yoftbty2lc7kmtldmyvj7w0m0n1ncbf6"
        }
      ],
      "source": {
        "defect": [
          "SLING-13362",
          "SLING-13364",
          "SLING-13365"
        ],
        "discovery": "UNKNOWN"
      },
      "title": "Apache Sling Engine: Hand-rolled parameter parser diverges from RFC/container parsing, enabling smuggling",
      "x_generator": {
        "engine": "Vulnogram 1.0.3"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-103866",
    "datePublished": "2026-11-05T12:33:00.994Z",
    "dateReserved": "2026-10-01T11:47:21.504Z",
    "dateUpdated": "2026-11-05T22:05:44.167Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Apache Sling Engine",
                "vendor": "Apache Software Foundation",
                "versions": [
                  {
                    "lessThan": "3.0.4",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@apache.org"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Inconsistent interpretation of HTTP requests (\u0027HTTP Request/Response smuggling\u0027) vulnerability in Apache Sling Engine.\u00a0The engine\u0027s query/form parser accepts non-standard percent-escapes, wrong charsets, and continues request processing on such errors.\n\n\n\nThis issue affects Apache Sling Engine: before 3.0.4.\n\n\n\nUsers are recommended to upgrade to version 3.0.4, which fixes the issue."
          }
        ],
        "id": "CVE-2026-103866",
        "lastModified": "2026-11-05T22:17:42.203",
        "metrics": {},
        "published": "2026-11-05T13:17:07.143",
        "references": [
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/yoftbty2lc7kmtldmyvj7w0m0n1ncbf6"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2026/11/05/8"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-436"
              },
              {
                "lang": "en",
                "value": "CWE-444"
              }
            ],
            "source": "security@apache.org",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

Author Source Type Date Other

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.