Sigstore Timestamp Authority
Vendor:
First CVE: Dec 4, 2025 · Active for under a year
2
Total CVEs
More Total CVEs than 53% of tracked products
1.0
Avg CVEs / Year
Bottom 1%
6.5
Avg CVSS
Higher Avg CVSS than 33% of tracked products
0.0%
KEV Rate
Bottom 1%
Trends Over Time
The number and severity of CVEs published that impact Sigstore Timestamp Authority over time
Volume of CVEsAvg CVSS Base Score
First CVE
Dec 4, 2025
7 months ago
Most Recent CVE
Apr 15, 2026
104 days ago
CVE Severity & Scoring
Sigstore Timestamp Authority2 CVEs
50%
50%
All CVEs353,173 CVEs
45%
40%
11%
MediumHigh
Attack Vector
Local1 (50.0%)
Network1 (50.0%)
Unknown0 (0.0%)
Physical0 (0.0%)
Adjacent Network0 (0.0%)
Attack Complexity
Low2 (100.0%)
High0 (0.0%)
Unknown0 (0.0%)
User Interaction
None1 (50.0%)
Unknown0 (0.0%)
Required1 (50.0%)
Privileges Required
Low0 (0.0%)
High0 (0.0%)
None2 (100.0%)
Unknown0 (0.0%)
Top CVEs
Signals from CVEs in this product scope (2 CVEs).
2 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2025-66564HIGH Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to strings.Split) an optionall | Dec 4, 2025 | 7.5 | 24 | NO | NO |
CVE-2026-39984MEDIUM Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in the VerifyTimestampResponse fun | Apr 15, 2026 | 5.5 | 21 | NO | NO |
Exploit Exposure
Signals from CVEs in this product scope (2 CVEs).
CISA KEV
0 CVEs
0.0% of CVEs· Bottom 1%
Metasploit
0 CVEs
0.0% of CVEs· Bottom 1%
Nuclei
0 CVEs
0.0% of CVEs· Bottom 1%
ExploitDB
0 CVEs
0.0% of CVEs· Bottom 1%
Social Chatter
Signals from CVEs in this product scope (2 CVEs).
Media Mentions
Signals from CVEs in this product scope (2 CVEs).
Top CNAs Publishing CVEs For Sigstore Timestamp Authority
Top CWEs
Versions
No cataloged versions.