Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 16.4%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-29181
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cpe:2.3:a:opentelemetry:opentelemetry:1.36.0
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cpe:2.3:a:opentelemetry:opentelemetry:1.37.0
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cpe:2.3:a:opentelemetry:opentelemetry:1.38.0
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cpe:2.3:a:opentelemetry:opentelemetry:1.39.0
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cpe:2.3:a:opentelemetry:opentelemetry:1.40.0