OpenTelemetry's disk retry default temp path enables local blob injection via OTLP Exporter

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0011, the 1st percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:21 UTC First seen by agentprime
2. 31 Oct 2026, 15:21 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-4625-4j76-fww9
• OSV: GHSA-4625-4j76-fww9
• github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-4625-4j76-fww9
• nvd.nist.gov/vuln/detail/CVE-2026-42191
• github.com/open-telemetry/opentelemetry-dotnet/pull/7106
• github.com/open-telemetry/opentelemetry-dotnet/commit/78dffdc5ebdf3dc090fdb94e3f1a32d3d1e26dfd
• github.com/open-telemetry/opentelemetry-dotnet

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.