USN-8641-1 (UBUNTU-CVE-2026-62899)

Vulnerability from osv_ubuntu – Published: 2026-08-18 15:02 – Updated: 2026-08-18 15:02 – Source website
VLAI
Summary
dotnet8, dotnet10 vulnerabilities
Details

Miha Zupan discovered that .NET did not properly interpret certain HTTP requests. An attacker could possibly use this issue to perform request smuggling and bypass a security feature. (CVE-2026-62899)

Ivan Demchuk discovered that .NET did not properly handle the removal of sensitive information before storage or transfer. An attacker could possibly use this issue to disclose sensitive information. (CVE-2026-62900)

Kevin Gosse discovered that .NET did not properly check an input for a loop condition. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-62901)

Kevin Gosse discovered that .NET did not properly perform error checking when securing shared resources used for diagnostics IPC. An attacker could possibly use this issue to elevate privileges. (CVE-2026-62909)

References
To clipboard 

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          },
          {
            "binary_name": "dotnet-templates-10.0",
            "binary_version": "10.0.111-0ubuntu1~26.04.1"
          },
          {
            "binary_name": "dotnet10",
            "binary_version": "10.0.111-10.0.11-0ubuntu1~26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "dotnet10",
        "purl": "pkg:deb/ubuntu/dotnet10@10.0.111-10.0.11-0ubuntu1~26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.0.111-10.0.11-0ubuntu1~26.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.0.100-10.0.0~rc1-0ubuntu1",
        "10.0.100-10.0.0~rc2-0ubuntu1",
        "10.0.100-10.0.0-0ubuntu1",
        "10.0.100-10.0.0-0ubuntu2",
        "10.0.101-10.0.1-0ubuntu1",
        "10.0.101-10.0.1-0ubuntu2",
        "10.0.101-10.0.1-0ubuntu3",
        "10.0.102-10.0.2-0ubuntu1",
        "10.0.103-10.0.3-0ubuntu1",
        "10.0.104-10.0.4-0ubuntu1",
        "10.0.105-10.0.5-0ubuntu1",
        "10.0.107-10.0.7-0ubuntu1~26.04.1",
        "10.0.108-10.0.8-0ubuntu1~26.04.1",
        "10.0.109-10.0.9-0ubuntu1~26.04.1",
        "10.0.110-10.0.10-0ubuntu1~26.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Miha Zupan discovered that .NET did not properly interpret certain HTTP\nrequests. An attacker could possibly use this issue to perform request\nsmuggling and bypass a security feature. (CVE-2026-62899)\n\nIvan Demchuk discovered that .NET did not properly handle the removal of\nsensitive information before storage or transfer. An attacker could possibly\nuse this issue to disclose sensitive information. (CVE-2026-62900)\n\nKevin Gosse discovered that .NET did not properly check an input for a loop\ncondition. An attacker could possibly use this issue to cause a denial of\nservice. (CVE-2026-62901)\n\nKevin Gosse discovered that .NET did not properly perform error checking\nwhen securing shared resources used for diagnostics IPC. An attacker could\npossibly use this issue to elevate privileges. (CVE-2026-62909)",
  "id": "USN-8641-1",
  "modified": "2026-08-18T15:02:43Z",
  "published": "2026-08-18T15:02:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8641-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62899"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62900"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62901"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62909"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "dotnet8, dotnet10 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-62899",
    "UBUNTU-CVE-2026-62900",
    "UBUNTU-CVE-2026-62901",
    "UBUNTU-CVE-2026-62909"
  ]
}



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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

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
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    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.