CVE-2026-29181OpenTelemetry-Go is the Go implementation of OpenTelemetry.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
opentelemetry opentelemetry opentelemetry:opentelemetry | from 1.36.0 before 1.41.0 | NVD |
References
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475exploit, vendor-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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.