CVE-2026-40894

OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048	Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244	Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309	Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/533	Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061	Issue Tracking Patch
https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:opentelemetry:opentelemetry::::::.net::*
	cpe:2.3:a:opentelemetry:opentelemetry.api::::::.net::*
	cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators::::::::

History

No history.

Information

Published : 2026-04-23 19:17

Updated : 2026-06-17 10:45

NVD link : CVE-2026-40894

Mitre link : CVE-2026-40894

CVE.ORG link : CVE-2026-40894

JSON object : View

Products Affected

opentelemetry

opentelemetry.api
opentelemetry.extensions.propagators
opentelemetry

CWE

CWE-789

Memory Allocation with Excessive Size Value

{"id": "CVE-2026-40894", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40894", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-23T19:22:40.530419Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "open-telemetry", "product": "opentelemetry-dotnet", "versions": [{"status": "affected", "version": ">= 0.5.0-beta.2, < 1.15.3"}]}, {"vendor": "open-telemetry", "product": "OpenTelemetry.Api", "versions": [{"status": "affected", "version": ">= 0.5.0-beta.2, < 1.15.3"}]}, {"vendor": "open-telemetry", "product": "OpenTelemetry.Extensions.Propagators", "versions": [{"status": "affected", "version": ">= 1.3.1, < 1.15.3"}]}]}], "published": "2026-04-23T19:17:28.810", "references": [{"url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/533", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j", "tags": ["Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-789"}]}], "descriptions": [{"lang": "en", "value": "OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3."}], "lastModified": "2026-06-17T10:45:50.477", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*", "vulnerable": true, "matchCriteriaId": "7CF8EB09-F7C5-49FA-BE45-15C9D6ACAE68", "versionEndExcluding": "1.15.3", "versionStartIncluding": "0.5.0"}, {"criteria": "cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:*", "vulnerable": true, "matchCriteriaId": "F4494846-0F47-4868-8315-76F82BA431CA", "versionEndExcluding": "1.15.3", "versionStartIncluding": "0.5.0"}, {"criteria": "cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FD34268F-5D62-4ACF-9E83-22DA39B5B7F3", "versionEndExcluding": "1.15.3", "versionStartExcluding": "1.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}