GHSA-P9F8-WVJ8-2FG8 OpenTelemetry-Go: UTF-8 replacement rune bypasses attribute length truncation

Summary The OpenTelemetry Go SDK trace package can fail to enforce AttributeValueLengthLimit for string attributes containing the valid Unicode replacement character U+FFFD. An oversized attacker-controlled attribute value that includes U+FFFD is returned untruncated, bypassing the configured...

OpenTelemetry-Go: UTF-8 replacement rune bypasses attribute length truncation

Summary The OpenTelemetry Go SDK trace package can fail to enforce AttributeValueLengthLimit for string attributes containing the valid Unicode replacement character U+FFFD. An oversized attacker-controlled attribute value that includes U+FFFD is returned untruncated, bypassing the configured...

CVE-2026-81869

OpenTelemetry-Go versions 1.10.0 through 1.33.0 contain a flaw in the sdk/trace/span.go attribute truncation path. When a string or string-slice attribute contains the valid Unicode replacement character U+FFFD , the safeTruncateValidUTF8 function misidentifies it as invalid UTF-8 and returns the...