CVE-2026-39882— OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
Quick assessment
Affected
open-telemetry opentelemetry-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
OpenTelemetry-Go是OpenTelemetry - CNCF开源的一个开发者工具包。 OpenTelemetry-Go 1.43.0之前版本存在安全漏洞，该漏洞源于未限制响应体大小，可能导致内存耗尽。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-39882
Vulnerability Information
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Vulnerability Title
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
OpenTelemetry-Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry-Go是OpenTelemetry - CNCF开源的一个开发者工具包。 OpenTelemetry-Go 1.43.0之前版本存在安全漏洞，该漏洞源于未限制响应体大小，可能导致内存耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-telemetry | opentelemetry-go | < 1.43.0 | - |
|
II. Public POCs for CVE-2026-39882
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-39882 (1)
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V. Comments for CVE-2026-39882
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