CVE-2025-66564

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Source
https://cve.org/CVERecord?id=CVE-2025-66564
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66564.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-66564
Aliases
Downstream
Related
Published
2025-12-04T22:37:13.307Z
Modified
2026-07-08T07:01:35.750723764Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Sigstore Timestamp Authority allocates excessive memory during request parsing
Details

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 optionally-provided OID (which is untrusted data) on periods. Similarly, function api.getContentType splits the Content-Type header (which is also untrusted data) on an application string. As a result, in the face of a malicious request with either an excessively long OID in the payload containing many period characters or a malformed Content-Type header, a call to api.ParseJSONRequest or api.getContentType incurs allocations of O(n) bytes (where n stands for the length of the function's argument). This vulnerability is fixed in 2.0.3.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66564.json",
    "cwe_ids": [
        "CWE-405"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/sigstore/timestamp-authority

Affected ranges

Type
GIT
Repo
https://github.com/sigstore/timestamp-authority
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
22406c3ff80d3543d2f2819e4f3cf944b5fe306c
Fixed
0cae34e197d685a14904e0bad135b89d13b69421
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.0.3"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:linuxfoundation:sigstore_timestamp_authority:*:*:*:*:*:*:*:*"
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.1.2
v0.1.3
v0.2.0
v0.2.1
v1.*
v1.0.0
v1.0.0-rc.0
v1.0.0-rc.1
v1.1.0
v1.1.1
v1.1.2
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.2.7
v1.2.8
v1.2.9
v2.*
v2.0.0
v2.0.1
v2.0.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66564.json"