CVE-2026-49835 Details
Description
Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.1.0, the global wrapMetrics middleware records raw HTTP request path r.URL.Path and raw HTTP request method r.Method as Prometheus labels for latency and request count metric vectors before routing, allowing an unauthenticated remote attacker to issue requests with random paths such as /api/v1/timestamp/<uuid> or random HTTP methods and create unbounded permanent time-series entries that exhaust memory. This issue is fixed in version 2.1.0.
A vulnerability in Sigstore Timestamp Authority prior to version 2.1.0 allows unauthenticated remote attackers to exhaust server memory. This issue arises from the global 'wrapMetrics' middleware, which records raw HTTP request paths and methods as Prometheus labels for latency and request count metrics. The middleware processes all incoming requests before routing, including unmatched paths and arbitrary methods, leading to unbounded time-series entries that consume memory. The vulnerability is exploited by sending requests with unique paths or custom HTTP methods, causing permanent memory exhaustion.
Users should update to Sigstore Timestamp Authority version 2.1.0 or later, where this vulnerability has been patched. Instructions for downloading the latest version are available on the Sigstore Timestamp Authority GitHub Releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 17, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linuxfoundation sigstore timestamp authority | < 2.1.0 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 30, 2026 | Initial Analysis | [email protected] |
| Jul 17, 2026 | CVE Modified | CISA-ADP |
| Jul 17, 2026 | New CVE Received | [email protected] |