🛡️ CVE-2026-42348
🟡 CVSS 5.9 — Medium ✅ No Known Exploit CWE-789 NVD
5.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

OpenTelemetry.OpAmp.Client is the OpAMP client for OpenTelemetry .NET. Prior to 0.2.0-alpha.1, when receiving responses from the OpAMP server over HTTP, the OpAMP client allocates an unbounded buffer to read all bytes from the server, with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured OpAMP server is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned in the response. This vulnerability is fixed in 0.2.0-alpha.1.

Details

Severity Medium
CVSS Score 5.9
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-789
Public Exploit ✅ No
Source NVD
Published 2026-05-05
Updated 2026-06-15
Modified 2026-05-13
Fix URL N/A

Affected Packages

Software From version Fixed in
opentelemetry.opamp.client — 0.2.0-alpha.1
unknown — —

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