OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.10.0 until 1.33.0, the sdk/trace/span.go attribute truncation path can fail to enforce AttributeValueLengthLimit for string and string-slice attributes containing the valid Unicode replacement character U+FFFD. safeTruncateValidUTF8 treats the valid replacement rune as invalid UTF-8 and returns the original input, while strings.ToValidUTF8 leaves that valid rune unchanged, so a second safeTruncate attempt can also return the oversized value. An attacker who controls span attribute content can retain values longer than the configured limit, increasing per-span memory use and weakening denial-of-service protection in the instrumented process. This issue is fixed in version 1.33.0.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.10.0 until 1.33.0, the
    sdk/trace/span.go attribute truncation path can fail to enforce AttributeValueLengthLimit for string and
    string-slice attributes containing the valid Unicode replacement character U+FFFD. safeTruncateValidUTF8
    treats the valid replacement rune as invalid UTF-8 and returns the original input, while
    strings.ToValidUTF8 leaves that valid rune unchanged, so a second safeTruncate attempt can also return the
    oversized value. An attacker who controls span attribute content can retain values longer than the
    configured limit, increasing per-span memory use and weakening denial-of-service protection in the
    instrumented process. This issue is fixed in version 1.33.0. (CVE-2026-81869)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.10.0 until 1.33.0, the     sdk/trace/span.go attribute truncation path can fail to enforce AttributeValueLengthLimit for string and     string-slice attributes containing the valid Unicode replacement character U+FFFD. safeTruncateValidUTF8     treats the valid replacement rune as invalid UTF-8 and returns the original input, while     strings.ToValidUTF8 leaves that valid rune unchanged, so a second safeTruncate attempt can also return the     oversized value. An attacker who controls span attribute content can retain values longer than the     configured limit, increasing per-span memory use and weakening denial-of-service protection in the     instrumented process. This issue is fixed in version 1.33.0. (CVE-2026-81869)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
458528	Echo: go.opentelemetry.io/otel/sdk: security update to 1.33.0	Tenable Cloud Security	Echo Local Security Checks	Local	medium
458528	Echo: go.opentelemetry.io/otel/sdk: security update to 1.33.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
448473	SCA: security update for go.opentelemetry.io/otel/sdk (GHSA-p9f8-wvj8-2fg8)	Tenable Cloud Security	SCA Checks	Local	medium
448473	SCA: security update for go.opentelemetry.io/otel/sdk (GHSA-p9f8-wvj8-2fg8)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
348193	Linux Distros Unpatched Vulnerability : CVE-2026-81869	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-81869

medium

Tenable Plugins

medium

medium

medium

medium

medium