CVE catalog
CVE-2026-81872
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
- Severity
- Medium · CVSS 6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.38% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | golang-opentelemetry-otel | sid | 1.46.0-3 | vulnerable |
| Debian | golang-opentelemetry-otel | forky | 1.46.0-2 | vulnerable |
| Debian | golang-opentelemetry-otel | trixie | 1.31.0-4 | vulnerable |
| Debian | golang-opentelemetry-otel | bookworm | 1.1.0-2 | not affected |
| Go | go.opentelemetry.io/otel/sdk/log | Not reported | 0.21.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | golang-opentelemetry-otel | source | sid | (unfixed) | not yet assigned | Not reported | [1149049] |
| Debian | golang-opentelemetry-otel | source | forky | (unfixed) | not yet assigned | Not reported | [1149049] |
| Debian | golang-opentelemetry-otel | source | trixie | (unfixed) | not yet assigned | Not reported | [1149049] |
| Debian | golang-opentelemetry-otel | source | bookworm | Not affected | unimportant | Not reported | [1149049] |
| Go | go.opentelemetry.io/otel/sdk/log | go | Not reported | 0.21.0 | Not reported | GHSA-HJF4-FPHR-2H65 | Not reported |
Notes
[trixie] golang-opentelemetry-otel: Minor issue
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [golang-opentelemetry-otel-dev]Affected
Source package: [golang-opentelemetry-otel]
Details (2)
1.31.0-4· all · trixieAffected
nvd · golang-opentelemetry-otel · debian · 13
1.31.0-4· all · trixieAffected
nvd · golang-opentelemetry-otel · debian · 13
[Debian 12 (Bookworm)]
- [golang-opentelemetry-otel-dev]Not affected
Source package: [golang-opentelemetry-otel]
Details (2)
1.1.0-2· all · bookwormNot affected
nvd · golang-opentelemetry-otel · debian · bookworm
1.1.0-2· all · bookwormNot affected
nvd · golang-opentelemetry-otel · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11872-1.json]
- [https://github.com/advisories/GHSA-hjf4-fphr-2h65]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-81872]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-81872]
- [https://security-tracker.debian.org/tracker/CVE-2026-81872]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81872.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]