CVE-2025-66506
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-66506
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-66506.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-66506
- Aliases
- Downstream
- Published
- 2025-12-04T22:04:41.637Z
- Modified
- 2025-12-06T14:10:30.396179Z
- 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
- Fulcio allocates excessive memory during token parsing
- Details
-
Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request with an (invalid) OIDC identity token in the payload containing many period characters, a call to extractIssuerURL incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This vulnerability is fixed in 1.8.3.
- Database specific
{ "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66506.json", "cwe_ids": [ "CWE-405" ] }- References
Affected packages
Git / github.com/sigstore/fulcio
Affected ranges
- Type
- GIT
- Repo
- https://github.com/sigstore/fulcio
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
0.*
0.1.0
v0.*
v0.1.1
v0.2.0
v0.3.0
v0.4.0
v0.4.1
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.4
v0.6.0
v1.*
v1.0.0
v1.0.0-rc.0
v1.1.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.7.0
v1.7.1
v1.8.0
v1.8.1
v1.8.2