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CVE-2026-49835 is a low severity vulnerability with a CVSS score of 0.0. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
An unauthenticated remote attacker can trigger unbounded memory growth on the timestamp authority server.
This vulnerability exists because the global wrapMetrics middleware records the raw HTTP request path (r.URL.Path) and raw HTTP request method (r.Method) as Prometheus labels for latency and request count metric vectors. Since this middleware runs before standard routing occurs, it executes for all incoming requests, including those for unmatched paths (yielding 404 responses) or arbitrary request methods. The Prometheus library registers a new, permanent time-series entry for every distinct label combination. An attacker can continuously issue requests containing random paths (e.g., /api/v1/timestamp/<uuid>) or random HTTP methods to exhaust system memory.
This issue has been patched by limiting the metric label values to a strict allowlist of expected paths (/ping, /api/v1/timestamp, /api/v1/timestamp/certchain) and expected HTTP methods (GET, POST, HEAD, OPTIONS). Unrecognized paths or methods are normalized to a static string ("unrecognized").
Users should update to version v2.0.7 or later.
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