GHSA-f83f-xpx7-ffpw

Source

https://github.com/advisories/GHSA-f83f-xpx7-ffpw

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-f83f-xpx7-ffpw/GHSA-f83f-xpx7-ffpw.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-f83f-xpx7-ffpw

Aliases

CVE-2025-66506

Published

2025-12-05T18:18:26Z

Modified

2025-12-05T18:31:30.493644Z

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

Function identity.extractIssuerURL currently 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. Relevant weakness: CWE-405: Asymmetric Resource Consumption (Amplification)

Details See identity.extractIssuerURL

Impact Excessive memory allocation

Database specific

{
    "github_reviewed": true,
    "nvd_published_at": "2025-12-04T22:15:49Z",
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-405"
    ],
    "github_reviewed_at": "2025-12-05T18:18:26Z"
}

References

Affected packages

Go / github.com/sigstore/fulcio

Package

Name: github.com/sigstore/fulcio; View open source insights on deps.dev
Purl: pkg:golang/github.com/sigstore/fulcio

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.8.3

Database specific

last_known_affected_version_range

"<= 1.8.2"