CVE-2026-42191
high
CVSS v3
7.8
CVSS v4 NEW
—
VIR risk
7.8
Description
OpenTelemetry's disk retry default temp path enables local blob injection via OTLP Exporter
Predictions
Exploit likelihood
75%
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 | >=1.8.0,<1.15.3 | 1.15.3 |
| NUGET | OpenTelemetry.Exporter.OpenTelemetryProtocol | >= 1.8.0, <= 1.15.2 | 1.15.3 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| opentelemetry | opentelemetry.exporter.opentelemetryprotocol | {"startIncluding":"1.8.0","endExcluding":"1.15.3"} | 1.15.3 |
References
- https://github.com/open-telemetry/opentelemetry-dotnet/pull/7106
- https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-4625-4j76-fww9
- https://nvd.nist.gov/vuln/detail/CVE-2026-42191
- https://github.com/open-telemetry/opentelemetry-dotnet/commit/78dffdc5ebdf3dc090fdb94e3f1a32d3d1e26dfd
- https://github.com/open-telemetry/opentelemetry-dotnet
- https://github.com/advisories/GHSA-4625-4j76-fww9
CWEs
CWE-379
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.