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CVE-2026-81869— OpenTelemetry-Go 属性截断绕过漏洞

一分钟漏洞结论

影响对象
open-telemetry opentelemetry-go
利用判断
尚无明确在野利用证据,仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本;无法立即升级时,限制受影响服务暴露并加强监测。

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 repl

CVSS 5.1 · Medium

可能的 ATT&CK 技术 1 AI

T1499 · Endpoint Denial of Service
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一、 漏洞 CVE-2026-81869 基础信息

漏洞信息

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Vulnerability Title
OpenTelemetry-Go: UTF-8 replacement rune bypasses attribute length truncation
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
Unicode编码处理不恰当
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
open-telemetry opentelemetry-go >= 1.10.0, < 1.33.0 -

二、漏洞 CVE-2026-81869 的公开POC

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三、漏洞 CVE-2026-81869 的情报信息

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CVE-2026-81869 补丁与修复 (2)

CVE-2026-81869 其他参考 (3)

同批安全公告 · open-telemetry · 2026-09-16 · 共 4 条

CVE-2026-81872 6.3 MEDIUM OpenTelemetry-Go 批量处理器忙等待漏洞
CVE-2026-81871 6.3 MEDIUM OpenTelemetry-Go gRPC导出器TLS证书绕过漏洞
CVE-2026-81870 2.0 LOW OpenTelemetry-Go: Exporter config logging may leak endpoint URLs in info logs

IV. Related Vulnerabilities

V. Comments for CVE-2026-81869

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