{"id":"CVE-2026-39882","aliases":["GHSA-w8rr-5gcm-pp58","GO-2026-4985"],"url":"https://o3.security/vulnerability/CVE-2026-39882","summary":"OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies","details":"OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.","published":"2026-04-08T20:24:19.246Z","modified":"2026-08-29T11:45:53.352826462Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp","fixedVersion":"1.43.0"},{"ecosystem":"Go","name":"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp","fixedVersion":"1.43.0"},{"ecosystem":"Go","name":"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp","fixedVersion":"0.19.0"}],"fix":{"url":"https://github.com/open-telemetry/opentelemetry-go/pull/8108","label":"open-telemetry/opentelemetry-go#8108"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39882.json"},{"type":"ADVISORY","url":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39882"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-go/pull/8108"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-29T11:45:53.352826462Z"}}