Skip to main content
VulnerabilityPublished

CVE-2026-41483: open-telemetry opentelemetry-dotnet-contrib · Unthrottled Resource Allocation

Affects open-telemetry opentelemetry-dotnet-contribSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 5.9 Medium · patch available : update open-telemetry opentelemetry-dotnet-contrib when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
open-telemetryopentelemetry-dotnet-contribAffected
  • <=1.15.0-beta.1
Fixed in–
NuGetopentelemetry-dotnet-contrib/opentelemetry.resources.azurepkg:nuget/opentelemetry-dotnet-contrib/opentelemetry.resources.azureOther threatsAffected
  • =1.15.0-beta.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in open-telemetry opentelemetry-dotnet-contrib version 1.15.1-beta.1, which streams responses and limits response size to 4 MiB. Users should upgrade to this version to remediate the vulnerability. As a workaround, disabling the Azure VM resource detector or implementing network-level protections such as firewall rules, mutual TLS, or service mesh to prevent man-in-the-middle attacks on the Azure VM instance metadata endpoint can mitigate the risk.

Description

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.

References

Community reviews

Loading reviews…