CVE-2026-40891
medium
CVSS v3
5.3
CVSS v4 NEW
—
VIR risk
5.3
Description
OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling
Predictions
Exploit likelihood
53%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| NuGet | OpenTelemetry.Exporter.OpenTelemetryProtocol | >=1.13.1,<1.15.3 | 1.15.3 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| opentelemetry | opentelemetry | {"startIncluding":"1.13.1","endExcluding":"1.15.3"} | 1.15.3 |
References
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/5980
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7064
- 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
CWEs
CWE-789
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.