# CVE-2026-45685: OpenTelemetry eBPF Instrumentation denial of service in MongoDB parser

Source: https://junglewise.ai/threats/cve-2026-45685-opentelemetry-ebpf-instrumentation-denial-of-service-in-mongodb  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-02. Updated: 2026-06-02  
License: CC BY 4.0 with a link back

CVE-2026-45685 · Severity: high · CVSS 7.5 · Published 2026-06-02

OpenTelemetry eBPF Instrumentation is a tool used to monitor and collect data from software applications. A vulnerability in its MongoDB traffic monitor allows a remote attacker to crash the monitoring agent by sending specially crafted network messages. This results in a loss of visibility into the monitored systems, potentially hiding other malicious activity or disrupting operational monitoring.

Technologies: [go.opentelemetry.io/obi (Go)](https://junglewise.ai/threats/technologies/go-opentelemetry-io-obi), [Opentelemetry Ebpf Instrumentation](https://junglewise.ai/threats/technologies/ebpf-instrumentation), [Opentelemetry Otelhttp](https://junglewise.ai/threats/technologies/otelhttp). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Opentelemetry](https://junglewise.ai/threats/vendors/opentelemetry).

## Quick answers

**Is CVE-2026-45685 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-45685 being exploited in the wild.

**How severe is CVE-2026-45685?** High severity, with a CVSS score of 7.5, published 2 June 2026.

**Which products and versions are affected?** go.opentelemetry.io/obi (Go) < 0.9.0, SEMVER:introduced=0,fixed=0.9.0; Opentelemetry Ebpf Instrumentation >= 0.1.0, < 0.9.0.

**Is there a fix for CVE-2026-45685?** Yes. go.opentelemetry.io/obi (Go): upgrade to 0.9.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-45685 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-45685?** Check whether you run go.opentelemetry.io/obi (Go), Opentelemetry Ebpf Instrumentation or Opentelemetry Otelhttp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- go.opentelemetry.io/obi (Go): upgrade to 0.9.0 or later

  ```sh
  go get go.opentelemetry.io/obi@v0.9.0
  ```


## Technical details

The MongoDB TCP parser in OpenTelemetry eBPF Instrumentation (go.opentelemetry.io/obi) contains multiple flaws leading to runtime panics. In versions 0.1.0 through 0.3.0, the 'parseOpMessage' and 'parseSections' functions fail to perform bounds checks on raw network buffers before reading, leading to slice-bounds panics. In versions 0.1.0 through 0.8.0, 'parseFirstField' performs an unchecked type assertion on BSON field values, causing an interface conversion panic if the input is not a string. An unauthenticated remote attacker can exploit these by sending malformed MongoDB OP_MSG packets or BSON documents, crashing the telemetry agent. The issue is fixed in version 0.9.0.

## Affected products

- OpenTelemetry OpenTelemetry eBPF Instrumentation (go.opentelemetry.io/obi) >= 0.1.0, < 0.9.0

## Identifiers

- CVE-2026-45685
- GHSA-j8p6-96vp-f3r9
- GO-2026-5456

## Timeline

- 2026-05-11: patched: Version 0.9.0 released
- 2026-05-12: advisory: GitHub Security Advisory published
- 2026-06-02: disclosed: CVE published to NVD

## References

- [https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0](https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0)
- [https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9](https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-j8p6-96vp-f3r9)

## Related threats

- [OpenTelemetry eBPF Instrumentation integer overflow in Memcached parser](https://junglewise.ai/threats/cve-2026-45686-opentelemetry-ebpf-instrumentation-integer-overflow-in-memcached)
- [OpenTelemetry eBPF Instrumentation buffer over-read in log enricher](https://junglewise.ai/threats/cve-2026-45684-opentelemetry-ebpf-instrumentation-buffer-over-read-in-log)
- [OpenTelemetry OBI kernel memory disclosure in Java TLS ioctl probe](https://junglewise.ai/threats/cve-2026-45683-opentelemetry-obi-kernel-memory-disclosure-in-java-tls-ioctl)
- [OpenTelemetry eBPF Instrumentation memory leak in Java TLS tracking](https://junglewise.ai/threats/cve-2026-45682-opentelemetry-ebpf-instrumentation-memory-leak-in-java-tls)
- [OpenTelemetry eBPF Instrumentation out-of-bounds read in message-buffer fallback](https://junglewise.ai/threats/cve-2026-45681-opentelemetry-ebpf-instrumentation-out-of-bounds-read-in-message)