← Vulnerability feed

Vulnerability record · CVE-2026-29181 · published 7 April 2026

CVE-2026-29181: Opentelemetry allocation without limits vulnerability

Opentelemetry · Opentelemetry

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 cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.

7.5 CVSS 3.1 High EPSS 0.87% · top 42.7% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
0.87%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References, 1 tagged exploit
11 Sep 2026Last modified by NVD

Description

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 cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475 ExploitVendor Advisory
https://access.redhat.com/errata/RHSA-2026:25271
https://access.redhat.com/errata/RHSA-2026:47735
https://access.redhat.com/errata/RHSA-2026:61314
https://access.redhat.com/errata/RHSA-2026:63140
https://access.redhat.com/errata/RHSA-2026:66521
https://access.redhat.com/security/cve/CVE-2026-29181
https://bugzilla.redhat.com/show_bug.cgi?id=2456252
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json

Track CVE-2026-29181 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2023-47108Opentelemetry allocation without limits vulnerabilityOpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. Starting in version 0.37.0 and prior to version 0.46.0, the gr…EPSS 1.6%7.5CVE-2023-45142Opentelemetry allocation without limits vulnerabilityOpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. A handler wrapper out of the box adds labels `http.user_agent`…EPSS 1.4%7.5CVE-2023-43810Opentelemetry uncontrolled resource consumption vulnerabilityOpenTelemetry, also known as OTel for short, is a vendor-neutral open-source Observability framework for instrumenting, generating, collecting, and e…EPSS 0.69%7.3CVE-2026-39883Opentelemetry untrusted search path vulnerabilityOpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.15.0 to 1.42.0, the fix for CVE-2026-24051 changed the Darwin ioreg command to use…EPSS 0.21%7.0CVE-2026-24051Opentelemetry untrusted search path vulnerabilityOpenTelemetry-Go is the Go implementation of OpenTelemetry. The OpenTelemetry Go SDK in version v1.20.0-1.39.0 is vulnerable to Path Hijacking (Untru…EPSS 0.17%5.9CVE-2026-41078Opentelemetry allocation without limits vulnerabilityOpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger may allow sustained memory pressure wh…EPSS 0.37%5.9CVE-2026-40182Opentelemetry vulnerabilityOpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTT…EPSS 0.56%5.3CVE-2026-54285Opentelemetry allocation without limits vulnerabilityopentelemetry-js is the OpenTelemetry JavaScript Client. Prior to 2.8.0, W3CBaggagePropagator.extract() in @opentelemetry/core does not enforce size …EPSS 0.40%

Source: NIST National Vulnerability Database (record CVE-2026-29181), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.