CVE-2025-66506
highPriorität · verfolgen · 0EPSS 0.002 · 11. PerzentilDEEUUSEPSS · bewertet 2026-10-27
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.
cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 6.9–7.5
SSVC
Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.
schwächen
Die CWE-Schwächeklassen, zu denen dies gehört.
betroffene Produkte (6)
Betroffene Produkte und Versionsbereiche.
Advisories (3)
Hersteller- und Ökosystem-Meldungen dazu.
- WID-SEC-W-2026-0199Red Hat OpenShift Pipelines Operator (Fulcio): Schwachstelle ermöglicht Denial of ServiceDeutsch2026-01-22csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat OpenShift Pipelines Operator ausnutzen, um einen Denial of Service Angriff durchzuführen.
- GHSA-f83f-xpx7-ffpwFulcio allocates excessive memory during token parsing2025-12-05ghsa · osvUS
Function [identity.extractIssuerURL](https://github.com/sigstore/fulcio/blob/main/pkg/identity/issuerpool.go#L44-L45) currently splits (via a call to [strings.Split](https://pkg.go.dev/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)](https://cwe.mitre.org/data/definitions/405.html) Details See [identity.extractIssuerURL](https://github.com/sigstore/fulcio/blob/main/pkg/identity/issuerpool.go#L44-L45) Impact Excessive memory allocation
- GO-2025-4193Fulcio allocates excessive memory during token parsing in github.com/sigstore/fulcio2025-12-08vendor · osvUS
Fulcio allocates excessive memory during token parsing in github.com/sigstore/fulcio
auch bekannt als (5)
Weitere Namen und Kennungen dieser Entität.
quellen
Welche Quellen diesen Datensatz belegen und wann.
Referenzen (7)
Externe Belege — Patches, Meldungen, Analysen.
- https://github.com/sigstore/fulcio/commit/765a0e57608b9ef390e1eeeea8595b9054c63a5acnnvd
- https://github.com/sigstore/fulcio/releasesPatchcnnvd
- https://github.com/sigstore/fulcio/security/advisories/GHSA-f83f-xpx7-ffpwcnnvd
- https://github.com/sigstore/fulcio/commit/765a0e57608b9ef390e1eeeea8595b9054c63a5aenisa_euvd
- https://github.com/sigstore/fulcio/security/advisories/GHSA-f83f-xpx7-ffpwenisa_euvd
- https://github.com/sigstore/fulcio/commit/765a0e57608b9ef390e1eeeea8595b9054c63a5aPatchnvd
- https://github.com/sigstore/fulcio/security/advisories/GHSA-f83f-xpx7-ffpwVendor Advisorynvd
Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.
Kostenloser Scan