{"api_version":"1","generated_at":"2026-11-13T21:06:09+00:00","cve":"CVE-2026-128085","urls":{"html":"https://cve.report/CVE-2026-128085","api":"https://cve.report/api/cve/CVE-2026-128085.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-128085","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-128085"},"summary":{"title":"opentelemetry-go: AttributeValueLengthLimit is fully bypassed by attribute values composed of valid U+FFFD runes","description":"OpenTelemetry-Go is the Go implementation of OpenTelemetry. From SDK version 1.33.0, SDK log version 0.9.0, and trace version 1.35.0 until version 1.47.0, the AttributeValueLengthLimit and WithAttributeValueLengthLimit truncation paths in sdk/internal/attrnorm, sdk/log/internal/attrnorm, and trace/auto.go do not count valid U+FFFD replacement characters. This is a distinct incomplete-fix defect in the replacement truncation code introduced by the remediation for CVE-2026-81869. Values composed of or dominated by those characters can therefore exceed the configured character and memory bound in span, log-record, and auto-instrumentation trace attributes. Attacker-controlled telemetry attributes can increase retained memory and pipeline pressure, while confidentiality and integrity are not affected. This issue is fixed in version 1.47.0.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-11-13 19:19:31","updated_at":"2026-11-13 19:19:31"},"problem_types":["CWE-135","CWE-770","CWE-135 CWE-135: Incorrect Calculation of Multi-Byte String Length","CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","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","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","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","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"url":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-q7gw-24fr-5p69","name":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-q7gw-24fr-5p69","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-telemetry/opentelemetry-go/releases/tag/trace/v1.47.0","name":"https://github.com/open-telemetry/opentelemetry-go/releases/tag/trace/v1.47.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/v1.47.0","name":"https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/v1.47.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/log/v1.47.0","name":"https://github.com/open-telemetry/opentelemetry-go/releases/tag/sdk/log/v1.47.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-telemetry/opentelemetry-go/commit/017b08c7f1018b619991aaf6b2299d4beb9da1d3","name":"https://github.com/open-telemetry/opentelemetry-go/commit/017b08c7f1018b619991aaf6b2299d4beb9da1d3","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-128085","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128085","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"open-telemetry","product":"opentelemetry-go","version":"affected >= 0.9.0, < 1.47.0","platforms":[]},{"source":"CNA","vendor":"open-telemetry","product":"go.opentelemetry.io/otel/sdk","version":"affected >= 1.33.0, < 1.47.0","platforms":[]},{"source":"CNA","vendor":"open-telemetry","product":"go.opentelemetry.io/otel/sdk","version":"affected >= 0.9.0, < 1.47.0","platforms":[]},{"source":"CNA","vendor":"open-telemetry","product":"go.opentelemetry.io/otel/sdk","version":"affected >= 1.35.0, < 1.47.0","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"opentelemetry-go","vendor":"open-telemetry","versions":[{"status":"affected","version":">= 0.9.0, < 1.47.0"}]},{"product":"go.opentelemetry.io/otel/sdk","vendor":"open-telemetry","versions":[{"status":"affected","version":">= 1.33.0, < 1.47.0"}]},{"product":"go.opentelemetry.io/otel/sdk","vendor":"open-telemetry","versions":[{"status":"affected","version":">= 0.9.0, < 1.47.0"}]},{"product":"go.opentelemetry.io/otel/sdk","vendor":"open-telemetry","versions":[{"status":"affected","version":">= 1.35.0, < 1.47.0"}]}],"descriptions":[{"lang":"en","value":"OpenTelemetry-Go is the Go implementation of OpenTelemetry. From SDK version 1.33.0, SDK log version 0.9.0, and trace version 1.35.0 until version 1.47.0, the AttributeValueLengthLimit and WithAttributeValueLengthLimit truncation paths in sdk/internal/attrnorm, sdk/log/internal/attrnorm, and trace/auto.go do not count valid U+FFFD replacement characters. This is a distinct incomplete-fix defect in the replacement truncation code introduced by the remediation for CVE-2026-81869. Values composed of or dominated by those characters can therefore exceed the configured character and memory bound in span, log-record, and auto-instrumentation trace attributes. Attacker-controlled telemetry attributes can increase retained memory and pipeline pressure, while confidentiality and integrity are not affected. 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From SDK version 1.33.0, SDK log version 0.9.0, and trace version 1.35.0 until version 1.47.0, the AttributeValueLengthLimit and WithAttributeValueLengthLimit truncation paths in sdk/internal/attrnorm, sdk/log/internal/attrnorm, and trace/auto.go do not count valid U+FFFD replacement characters. This is a distinct incomplete-fix defect in the replacement truncation code introduced by the remediation for CVE-2026-81869. Values composed of or dominated by those characters can therefore exceed the configured character and memory bound in span, log-record, and auto-instrumentation trace attributes. Attacker-controlled telemetry attributes can increase retained memory and pipeline pressure, while confidentiality and integrity are not affected. This issue is fixed in version 1.47.0.","Type":"Description","Title":"opentelemetry-go: AttributeValueLengthLimit is fully bypassed by"}]}}}