CVE-2026-40182

OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40182.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-789"
    ]
}

References

Affected packages

Git / github.com/open-telemetry/opentelemetry-dotnet

Affected ranges

Type

GIT

Repo

https://github.com/open-telemetry/opentelemetry-dotnet

Events

Introduced

640cf63628567b76b348b26988920dbc0b5c1662

Fixed

4b588c1cacd8ae7eade8b4c5bccda4acfb7c35e5

Database specific

{
    "cpe": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*",
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "extracted_events": [
        {
            "introduced": "1.13.1"
        },
        {
            "fixed": "1.15.2"
        }
    ]
}

Affected versions

core-1.*

core-1.13.1

core-1.14.0

core-1.14.0-rc.1

core-1.15.0

core-1.15.1

coreunstable-1.*

coreunstable-1.13.1-beta.1

coreunstable-1.14.0-beta.1

coreunstable-1.15.0-beta.1

coreunstable-1.15.1-beta.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40182.json"