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CVE-2026-45287 open-telemetry CVE debrief

A low-severity vulnerability (CVSS Score: 2.1) was found in OpenTelemetry-Go, a Go implementation of OpenTelemetry. The issue, tracked as CVE-2026-45287, affects versions prior to 0.0.17. The vulnerability is caused by the `ParseFile` function in `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaking one file descriptor on each successful call. This can lead to a denial of service if an attacker can control the path being parsed, allowing them to repeatedly parse schema files in a long-running process and exhaust the process file descriptor limit.

Vendor
open-telemetry
Product
go.opentelemetry.io/otel/schema/v1.1
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Users of OpenTelemetry-Go, especially those who expose repeated schema parsing to an attacker-controlled path, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The `ParseFile` function in OpenTelemetry-Go's schema packages (`go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1`) does not close the schema file after parsing it, resulting in a file descriptor leak. This can be exploited by an attacker if they can control the path being parsed.

Defensive priority

Low

Recommended defensive actions

  • Update to version 0.0.17 or later of OpenTelemetry-Go.
  • Avoid exposing repeated schema parsing to an attacker-controlled path.

Evidence notes

CVE-2026-45287 was published on 2026-06-04T16:16:38.690Z and modified on 2026-06-08T19:16:45.260Z. The vulnerability has a CVSS Score of 2.1 and is classified as LOW severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45287 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45287

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45287 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45287

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.