{"id":"CVE-2026-41178","aliases":["GHSA-5wrp-cwcj-q835","GO-2026-5158"],"url":"https://o3.security/vulnerability/CVE-2026-41178","summary":"OpenTelemetry-Go's baggage parsing no longer caps raw header length","details":"OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.","published":"2026-06-04T14:38:23.707Z","modified":"2026-08-12T18:48:02.496369364Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":{"score":0.00237,"percentile":0.14935,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"go.opentelemetry.io/otel/baggage","fixedVersion":"1.42.0"},{"ecosystem":"Go","name":"go.opentelemetry.io/otel/propagation","fixedVersion":"1.42.0"},{"ecosystem":"Go","name":"go.opentelemetry.io/otel/baggage","fixedVersion":"1.44.0"},{"ecosystem":"Go","name":"go.opentelemetry.io/otel/propagation","fixedVersion":"1.44.0"}],"fix":{"url":"https://github.com/open-telemetry/opentelemetry-go/pull/7880","label":"open-telemetry/opentelemetry-go#7880"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41178.json"},{"type":"ADVISORY","url":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q835"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41178"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-go/pull/7880"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T18:48:02.496369364Z"}}