CVE-2026-29181
OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
- State
- Published
- Severity
- 7.5 High
- Published
- Apr 7, 2026
- Updated
- Sep 17, 2026
- Reserved
- Mar 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
opentelemetry-goopen-telemetry |
|
References
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475
- https://access.redhat.com/security/cve/CVE-2026-29181vdb-entry
- RHBZ#2456252issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29181.json
- https://access.redhat.com/errata/RHSA-2026:63140vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:61314vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:66521vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:25271vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:47735vendor-advisory
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