{"id":"AZL-103056","summary":"CVE-2026-81871 affecting package azl-otel-collector 0.127.0-1","details":"OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the exporters/otlp/otlplog/otlploggrpc package loads OTEL_EXPORTER_OTLP_LOGS_CERTIFICATE, OTEL_EXPORTER_OTLP_CERTIFICATE, and related client certificate environment variables through loadEnvTLS into cfg.tlsCfg, but newGRPCDialOptions does not apply cfg.tlsCfg when creating gRPC transport credentials. The environment-only TLS path instead uses credentials.NewTLS with system roots and no configured client certificate, bypassing intended private CA pinning and mutual TLS unless the application also supplies WithTLSCredentials. A network attacker able to intercept or spoof the collector connection with a system-trusted certificate can read or alter log telemetry. This issue is fixed in version 0.21.0.","modified":"2026-09-19T14:16:04.531110471Z","published":"2026-09-16T21:17:22Z","upstream":["CVE-2026-81871"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81871"}],"affected":[{"package":{"name":"azl-otel-collector","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/azl-otel-collector"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.127.0-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-103056.json"}}],"schema_version":"1.9.0"}