CVE-2026-40891
- Source
- https://cve.org/CVERecord?id=CVE-2026-40891
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40891.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-40891
- Aliases
- Downstream
MINI (1)
- Published
- 2026-04-23T17:54:36Z
- Modified
- 2026-10-28T02:30:39Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling
- Details
-
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. Prior to the fix, a malformed trailer could encode an extremely large length-delimited protobuf field which was used directly for allocation, allowing excessive memory allocation and potential denial of service (DoS). This vulnerability is fixed in 1.15.2.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-789" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40891.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40891.json
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-mr8r-92fq-pj8p
- https://nvd.nist.gov/vuln/detail/CVE-2026-40891
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/5980
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7064
Affected packages
Git / github.com/open-telemetry/opentelemetry-dotnet
Affected ranges
- Type
- GIT
- Repo
- https://github.com/open-telemetry/opentelemetry-dotnet
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "1.13.1" }, { "fixed": "1.15.3" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "cpe": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*", "range": [ { "introduced": "1.13.1" }, { "fixed": "1.15.3" } ], "source": "CPE_RANGE" } ] }