CVE-2026-49835
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.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linuxfoundation:sigstore_timestamp_authority
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9c54-x2g4-v92j | Go | github.com/sigstore/timestamp-authority/v2 | <2.1.0 | 2.1.0 |
| GHSA-9c54-x2g4-v92j | Go | github.com/sigstore/timestamp-authority | <=1.2.9 | no fix published |
| GO-2026-5851 | Go | github.com/sigstore/timestamp-authority | all versions | no fix published |
| GO-2026-5851 | Go | github.com/sigstore/timestamp-authority/v2 | <2.1.0 | 2.1.0 |