What is CVE-2026-29181?

CVE-2026-29181 is a high-severity vulnerability in Open-telemetry Opentelemetry-go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-07.

How severe is CVE-2026-29181?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Open-telemetry Opentelemetry-go

CVE-2026-29181

OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify…

EPSS: 0.001 (23.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Open-telemetry Opentelemetry-go — versions >= 1.36.0, < 1.41.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-29181?: CVE-2026-29181 is a high-severity vulnerability in Open-telemetry Opentelemetry-go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-07.
How severe is CVE-2026-29181?: High severity. CVSS v3 base score is 7.5 out of 10.