CVE-2026-29181: CWE-770: Allocation of Resources Without Limits or Throttling in open-telemetry opentelemetry-go
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.
AI Analysis
Technical Summary
The vulnerability in OpenTelemetry-Go (CVE-2026-29181) arises from the way multi-value baggage headers are parsed between versions 1.36.0 and 1.40.0. Each header field-value is parsed independently and aggregated, enabling an attacker to cause excessive CPU and memory resource consumption by sending numerous baggage header lines. This constitutes an allocation of resources without limits or throttling (CWE-770). The issue is resolved in version 1.41.0. No known exploits are reported in the wild. Vendor advisories from Red Hat acknowledge the vulnerability but do not provide explicit patch details beyond the fixed version.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause high CPU and memory usage on affected systems by sending many baggage header lines, potentially leading to denial of service due to resource exhaustion. There is no impact on confidentiality or integrity reported. The CVSS score of 7.5 reflects a high impact on availability.
Mitigation Recommendations
A fix is available in OpenTelemetry-Go version 1.41.0. Users should upgrade to version 1.41.0 or later to remediate this vulnerability. The vendor advisories do not indicate any alternative mitigations or temporary workarounds. Patch status is confirmed by the fixed version information. No additional action is required beyond upgrading.
CVE-2026-29181: CWE-770: Allocation of Resources Without Limits or Throttling in open-telemetry opentelemetry-go
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 v3.1
Score 7.5high
Affected software
pkg:golang/github.com/open-telemetry/opentelemetry-goRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in OpenTelemetry-Go (CVE-2026-29181) arises from the way multi-value baggage headers are parsed between versions 1.36.0 and 1.40.0. Each header field-value is parsed independently and aggregated, enabling an attacker to cause excessive CPU and memory resource consumption by sending numerous baggage header lines. This constitutes an allocation of resources without limits or throttling (CWE-770). The issue is resolved in version 1.41.0. No known exploits are reported in the wild. Vendor advisories from Red Hat acknowledge the vulnerability but do not provide explicit patch details beyond the fixed version.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause high CPU and memory usage on affected systems by sending many baggage header lines, potentially leading to denial of service due to resource exhaustion. There is no impact on confidentiality or integrity reported. The CVSS score of 7.5 reflects a high impact on availability.
Mitigation Recommendations
A fix is available in OpenTelemetry-Go version 1.41.0. Users should upgrade to version 1.41.0 or later to remediate this vulnerability. The vendor advisories do not indicate any alternative mitigations or temporary workarounds. Patch status is confirmed by the fixed version information. No additional action is required beyond upgrading.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-04T14:44:00.713Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-29181","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:25271","vendor":"Red Hat"}]
Threat ID: 69d5874b43e2781bad84eb00
Added to database: 04/07/2026, 22:38:03 UTC
Last enriched: 07/30/2026, 21:56:38 UTC
Last updated: 07/31/2026, 20:36:52 UTC
Views: 142
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