CVE-2026-39882: CWE-789: Memory Allocation with Excessive Size Value in open-telemetry opentelemetry-go
CVE-2026-39882 is a medium severity vulnerability in the open-telemetry opentelemetry-go library versions prior to 1.43.0. The vulnerability arises because the OTLP HTTP exporters read the entire HTTP response body into memory without limiting its size, which can lead to memory exhaustion. This issue can be exploited if the collector endpoint is attacker-controlled or if a network attacker can intercept and manipulate the connection. The vulnerability has been fixed in version 1.43.0.
AI Analysis
Technical Summary
The open-telemetry opentelemetry-go library before version 1.43.0 contains a memory allocation vulnerability (CWE-789) in its OTLP HTTP exporters. Specifically, the exporters read the full HTTP response body into an in-memory buffer without imposing size limits. This can cause excessive memory consumption, potentially leading to denial of service via memory exhaustion. The vulnerability is addressed in version 1.43.0 of the library.
Potential Impact
An attacker who controls the collector endpoint or can manipulate network traffic may cause the vulnerable client to allocate excessive memory by sending a large HTTP response body. This results in memory exhaustion, leading to denial of service conditions. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
Upgrade the opentelemetry-go library to version 1.43.0 or later, where this vulnerability is fixed. Patch status is confirmed by the version information in the description. No other mitigation is indicated.
CVE-2026-39882: CWE-789: Memory Allocation with Excessive Size Value in open-telemetry opentelemetry-go
Description
CVE-2026-39882 is a medium severity vulnerability in the open-telemetry opentelemetry-go library versions prior to 1.43.0. The vulnerability arises because the OTLP HTTP exporters read the entire HTTP response body into memory without limiting its size, which can lead to memory exhaustion. This issue can be exploited if the collector endpoint is attacker-controlled or if a network attacker can intercept and manipulate the connection. The vulnerability has been fixed in version 1.43.0.
CVSS v3.1
Score 5.3medium
Affected software
pkg:golang/github.com/open-telemetry/opentelemetry-goRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The open-telemetry opentelemetry-go library before version 1.43.0 contains a memory allocation vulnerability (CWE-789) in its OTLP HTTP exporters. Specifically, the exporters read the full HTTP response body into an in-memory buffer without imposing size limits. This can cause excessive memory consumption, potentially leading to denial of service via memory exhaustion. The vulnerability is addressed in version 1.43.0 of the library.
Potential Impact
An attacker who controls the collector endpoint or can manipulate network traffic may cause the vulnerable client to allocate excessive memory by sending a large HTTP response body. This results in memory exhaustion, leading to denial of service conditions. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
Upgrade the opentelemetry-go library to version 1.43.0 or later, where this vulnerability is fixed. Patch status is confirmed by the version information in the description. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-07T20:32:03.010Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d6bfa81cc7ad14dab01ab8
Added to database: 04/08/2026, 20:50:48 UTC
Last enriched: 06/03/2026, 21:15:39 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 141
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