{"cve":"CVE-2026-29181","nvd":{"published":"2026-04-07T21:17:16.003","modified":"2026-09-11T13:17:25.487","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475","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"],"products":["opentelemetry:opentelemetry"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-29181","score":0.0079,"percentile":0.5628,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mh2q-q3fh-2475","url":"https://osv.dev/vulnerability/GHSA-mh2q-q3fh-2475","summary":"OpenTelemetry-Go: multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)","modified":"2026-09-10T03:51:02.265229173Z","packages":[{"ecosystem":"Go","name":"go.opentelemetry.io/otel","purl":"pkg:golang/go.opentelemetry.io/otel","ranges":[">=1.36.0 <1.41.0"],"fixed":["1.41.0"]}]},{"id":"GO-2026-5506","url":"https://osv.dev/vulnerability/GO-2026-5506","summary":"OpenTelemetry-Go: Multi-value baggage header extraction causes excessive allocations in go.opentelemetry.io/otel","modified":"2026-08-06T15:11:52.423578391Z","packages":[{"ecosystem":"Go","name":"go.opentelemetry.io/otel","purl":"pkg:golang/go.opentelemetry.io/otel","ranges":[">=1.36.0 <1.41.0"],"fixed":["1.41.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}