What’s Vulnerable › Vulnerabilities

CVE-2026-45287: OpenTelemetry-Go's Schema ParseFile leaks file descriptors on each parse

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-04 · updated 2026-07-22
• Weakness: CWE-772

Description

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.0.17, `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each successful `ParseFile` call. `ParseFile` opens the schema file and passes it to `Parse` without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. Exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path. Version 0.0.17 contains a patch for the issue.

Affected products

• @opentelemetry Telemetry Schema Files: before 0.0.17 — fixed in 0.0.17

How to fix

Upgrade to a fixed version: @opentelemetry Telemetry Schema Files 0.0.17. Check the vendor advisory for mitigations.

References

• https://github.com/open-telemetry/opentelemetry-go/commit/e72a235518cb773137efd80336a179028bc34684
• https://github.com/open-telemetry/opentelemetry-go/commit/f12d198f161b61735d65705248715aa97021ba8d
• https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m
• https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78m

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