CVE-2026-59296
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
Using untrusted, non-normalized input as-is for metrics data (such as metric names, tag keys, or tag values) is a dangerous antipattern that general-purpose instrumentation should never perform. The vulnerability affects Micrometer versions 1.17.0, 1.16.0-1.16.6, 1.15.0-1.15.12, 1.14.0-1.14.16, and 1.9.18 and earlier.
Risk Assessment
An attacker could inject malicious data into monitoring systems, potentially leading to metric manipulation, data poisoning, or attacks on analytics systems, which could disrupt monitoring and decision-making.
Recommendation
Update Micrometer to a patched version and avoid using untrusted data without normalization in metrics.
Other vulnerabilities in Micrometer
See all- CVE-2026-59295Medium
Outbound HTTP requests using a Micrometer-instrumented client can cause a denial-of-service (DoS) condition due to an unbounded memory leak. Affected versions include Micrometer 1.17.0, 1.16.0-1.16.6, 1.15.0-1.15.12, 1.14.0-1.14.16, and 1.9.18 and earlier.
- CVE-2026-40984High
A vulnerability in Micrometer allows remote denial of service (DoS) via specially crafted HTTP requests. Affects multiple versions of micrometer-core, micrometer-jetty11, and micrometer-jetty12.
- CVE-2026-40983High
In Micrometer, it is possible for a user to provide specially crafted gRPC requests that may cause a denial-of-service (DoS) condition. Affected versions: 1.16.0 through 1.16.5; 1.15.0 through 1.15.11.
Original NVD description (English source)
Using untrusted, non-normalized input as-is for metrics data (such as metric names, tag keys, or tag values) is a dangerous antipattern that general-purpose instrumentation should never perform. Micrometer 1.17.0 Micrometer 1.16.0 - 1.16.6 Micrometer 1.15.0 - 1.15.12 Micrometer 1.14.0 - 1.14.16 Micrometer 1.9.18 and earlier