CVE-2026-45685 OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages
A remote unauthenticated attacker can crash the telemetry agent by sending malformed MongoDB wire messages, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45685?
CVE-2026-45685 is a high-severity denial of service vulnerability in open-telemetry opentelemetry-ebpf-instrumentation, published on 2 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.1.0 to before version 0.9.0, malformed MongoDB wire messages can trigger uncaught panics in the MongoDB TCP parser, allowing a remote unauthenticated attacker to crash the telemetry agent and cause a denial of service. The parser operates on raw attacker-controlled network payloads before the input is fully validated, so a single crafted message can terminate telemetry collection for the affected process or node. This issue has been patched in version 0.9.0.
Which versions are affected by CVE-2026-45685?
3 open source packages ship an affected version, including go.opentelemetry.io/obi. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
go.opentelemetry.io/obi Go | All versions | 0.9.0 |
go.opentelemetry.io/obi Go | All versions | 0.9.0 |
go.opentelemetry.io/obi Go | All versions | 0.9.0 |
Products include Opentelemetry Ebpf Instrumentation.
How do I fix CVE-2026-45685?
Upgrade go.opentelemetry.io/obi to 0.9.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-45685 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45685 exists.
Other vulnerabilities in open-telemetry opentelemetry-ebpf-instrumentation
- CVE-2026-45678 OpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads
- CVE-2026-45686 OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI
- CVE-2026-45679 OpenTelemetry eBPF Instrumentation: Redis error text is exported in span status messages
- CVE-2026-45680 OpenTelemetry eBPF Instrumentation: Unbounded BPF internal metrics replay can exhaust CPU
- CVE-2026-45681 OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size
Sources
Also known as GHSA-j8p6-96vp-f3r9, GO-2026-5456.