Vulnerability in go.opentelemetry.io/obi (CVE-2026-45680)
Summary
Vulnerability in go.opentelemetry.io/obi (CVE-2026-45680). Risk of unauthorized operations or information disclosure. Exploitable via probeMetrics. Mitigation: upgrade to 0.9.0 or later.
Original description
The description as published by the source.
Summary
OBI replays BPF probe hits into histogram observations by looping once per recorded run count. On busy systems, the run-count delta can become very large, causing the metrics exporter to spend excessive CPU time in a tight loop every collection interval.
Details
The vulnerable loop is in pkg/export/prom/prom_bpf.go. During each metrics tick, OBI iterates through probeMetrics and then executes for range metric.count, invoking BpfProbeLatency(...) for each individual recorded hit.
The count comes from calculateStats() in the same file, where deltaCount := bp.runCount - bp.prevRunCount is calculated and returned without any cap before the per-hit replay loop.
If probe activity spikes between scrape intervals, deltaCount can be very large. The exporter then spends CPU time proportional to the number of probe hits rather than the number of metric series.
PoC
Local testing with a small reproducer confirmed the replay-loop behavior and showed CPU scaling with the recorded hit count rather than the number of metric series.
Use a vulnerable build and enable internal metrics export:
git checkout v0.0.0-rc.1+build
make build
export…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-45680 has been found in go.opentelemetry.io/obi.
Attackers can target a specific entry point like probeMetrics over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.9/10.
What to do: upgrade go.opentelemetry.io/obi to 0.9.0 or later.
If unsure, ask your IT team or search "go.opentelemetry.io/obi CVE-2026-45680" on the vendor's site.
CVE-2026-45680 (go.opentelemetry.io/obi) — CWE-400 / CVSS v3 5.9
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: probeMetrics / deltaCount / top / pidstat
Patched: 0.9.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-400) exists in go.opentelemetry.io/obi. Attackers reach the vulnerable code path via probeMetrics without authentication.
Check the vendor advisory for the affected versions of go.opentelemetry.io/obi. Attack surface: probeMetrics / deltaCount / top / pidstat.
Severity: Medium (CVSS 5.9/10). Risk of unauthorized operations or information disclosure.
Update to 0.9.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'go.opentelemetry.io/obi' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'go.opentelemetry.io/obi' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
go.opentelemetry.io/obiを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade go.opentelemetry.io/obi to 0.9.0ステージング環境で 0.9.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com