CVE-2026-81872Medium· 6.3▾ TwilightPoC availableOpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission fills its asynchronous export buffer…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 34.7 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Exploit / PoC code exists
0.3%
0.3% → 0.5%
Last analysed / modified upstream
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission fills its asynchronous export buffer while the exporter is backpressured. NewBatchingProcessor wraps the exporter with newBufferExporter(exporter, 1), and the poll loop calls queue.TryDequeue and bufferExporter.EnqueueExport before immediately signaling pollTrigger whenever the queue remains at or above batchSize. Because a failed nonblocking EnqueueExport leaves the queue length unchanged, the processor repeatedly retries without waiting for its ticker, exhausting CPU and degrading or denying service in the embedding process. This issue is fixed in version 0.21.0.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
go.opentelemetry.io/otel/sdk/log < 0.21.0Patched in:
go.opentelemetry.io/otel/sdk/log 0.21.0Source: https://github.com/advisories/GHSA-hjf4-fphr-2h65
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-81871Medium· 6.3OpenTelemetry-Go is the Go implementation of OpenTelemetry
CVE-2026-81869Medium· 5.1OpenTelemetry-Go is the Go implementation of OpenTelemetry
CVE-2026-81870Low· 2.0OpenTelemetry-Go is the Go implementation of OpenTelemetry
CVE-2026-47256Medium· 5.3OpenTelemetry, also known as OTel, is a vendor-neutral open source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, and logs
CVE-2026-114603Medium· 5.3OpenTelemetry Python: Unbounded tracestate parsing in opentelemetry-api
CVE-2018-14567Medium· 6.5libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-803…