Memory leak in Micrometer - CVE-2026-59295
Published: August 31, 2026
Vulnerability identifier: #VU146386
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59295
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an unbounded memory leak in MicrometerHttpClientInterceptor when handling outbound asynchronous HTTP requests that fail before any response message is received. A remote attacker can cause pre-response transport failures to cause a denial of service.
Exploitation requires a Micrometer-instrumented Apache HttpAsyncClient and outbound requests to a hostile or unreliable remote endpoint, or requests that can be subjected to pre-response transport failures.
Affected software
Micrometer
How to mitigate CVE-2026-59295
Install security update from vendor's website.
Micrometer - addressed in versions 1.9.19, 1.14.17, 1.15.13, 1.16.6.1, 1.16.7, 1.17.0.1, 1.17.1