CVE-2026-41483
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
OpenTelemetry.Resources.Azure versions 1.15.0-beta.1 and earlier read the Azure VM instance metadata service response into memory without any size limit. An attacker controlling the endpoint or performing a man-in-the-middle attack can return an arbitrarily large response, causing unbounded heap allocation and potentially terminating the process.
Risk Assessment
This can lead to denial of service (DoS) for .NET applications using this library, causing service disruptions and loss of availability.
Recommendation
Update the library to version 1.15.1-beta.1 or later. As a workaround, disable the Azure VM resource detector or use network-level controls (e.g., firewall rules, mTLS) to prevent MITM attacks.
Related vulnerabilities
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- CVE-2026-123551Critical
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- CVE-2026-123550Critical
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- CVE-2026-123549Critical
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- CVE-2026-124060Critical
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- CVE-2026-124059Critical
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- CVE-2026-124058Critical
A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. The function setWiFiRepeaterConfig in the file /cgi-bin/cstecgi.cgi is affected, where manipulation of the ApCliKeyStr argument can lead to a buffer overflow. The attack can be launched remotely, and the exploit has been made available to the public and could be used for attacks.
- CVE-2026-124057Critical
A security flaw has been discovered in TOTOLINK CA300-PoE 6.2c.884. This impacts the function setWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi. Manipulation of the argument Key1Str1 results in a buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
- CVE-2026-123966Critical
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- CVE-2026-120984Critical
A flaw was found in the Keycloak server's client management component. When a client is created or imported with authorization services enabled, the system fails to properly clear an internal session attribute used during setup. An authenticated attacker with client management permissions can bypass security controls and upload a malicious JavaScript policy that executes on the server.
Original NVD description (English source)
OpenTelemetry.Resources.Azure is the .NET resource detector for Azure environments. In versions 1.15.0-beta.1 and earlier, the AzureVmMetaDataRequestor class makes HTTP requests to the Azure VM instance metadata service and reads the response body into memory without any size limit. An attacker who controls the configured endpoint, or who can intercept traffic to it via a man-in-the-middle attack, can return an arbitrarily large response body. This causes unbounded heap allocation in the consuming process, leading to high transient memory pressure, garbage-collection stalls, or an OutOfMemoryException that terminates the process. As a workaround, disable the Azure VM resource detector or use network-level controls such as firewall rules, mTLS, or a service mesh to prevent man-in-the-middle attacks on the Azure VM instance metadata endpoint. This issue is fixed in version 1.15.1-beta.1, which streams responses rather than buffering them entirely in memory and ignores responses larger than 4 MiB.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

