> CVE-2025-66506 [HIGH]

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PUBLISHED
2025-12-04 22:15
MODIFIED
2025-12-04 22:15
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.23%
Top 86.6%
DATA SOURCES:
NVD 🔗 2025-12-04 CVE PROJECT 🔗 2026-01-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-10-28 OSV 🔗 2026-11-08

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-405

> CWE DETAILED DESCRIPTIONS

CWE-405: Asymmetric Resource Consumption (Amplification) - The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat AI Inference Server 3.2.5 (ROCm)
Red Hat AI Inference Server 3.2.5 (ROCm) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.5 (TPU)
Red Hat AI Inference Server 3.2.5 (TPU) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.5 (ROCm)
Red Hat AI Inference Server 3.2.5 (ROCm) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.5 (CUDA)
Red Hat AI Inference Server 3.2.5 (CUDA) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.2.5 (CUDA)
Red Hat AI Inference Server Model Optimization Tools 3.2.5 (CUDA) is now available.
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.21.0
The 1.21.0 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: RHACS 4.8.8 security and bug fix update
Updated images are now available for Red Hat Advanced Cluster Security (RHACS), which typically include new features, bug fixes, and/or security patches.
Red Hat Security Advisory: RHTAS 1.3.2 - Red Hat Trusted Artifact Signer Release
The 1.3.2 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHACS 4.9.3 security and bug fix update
Updated images are now available for Red Hat Advanced Cluster Security (RHACS), which typically include new features, bug fixes, and/or security patches.
Red Hat Security Advisory: RHACS 4.9.3 security and bug fix update
Updated images are now available for Red Hat Advanced Cluster Security (RHACS), which typically include new features, bug fixes, and/or security patches.
Red Hat Security Advisory: RHOAI 2.25.2 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: Red Hat Quay 3.10.18
Red Hat Quay 3.10.18 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.9.18
Red Hat Quay 3.9.18 is now available with bug fixes.
Red Hat Security Advisory: OpenShift Security Profiles Operator bug fix and enhancement update
An updated OpenShift Security Profiles Operator image that fixes various bugs and adds new enhancements is now available for the Red Hat OpenShift Enterprise 4 catalog.
Red Hat Security Advisory: RHTAS 1.2.2 - Red Hat Trusted Artifact Signer Release
The 1.2.2 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.2.2 - Red Hat Trusted Artifact Signer Release
The 1.2.2 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: Network Observability 1.11.0 for OpenShift
Network Observability 1.11 for Red Hat OpenShift.
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.2 (ROCm)
Red Hat AI Inference Server 3.2.2 (ROCm) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.2 (CUDA)
Red Hat AI Inference Server 3.2.2 (CUDA) is now available.
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.15.3
The 1.15.3 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.15.4
The 1.15.4 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: RHOAI 3.3 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.15.4
The 1.15.4 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.20.3
The 1.20.3 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.20.3
The 1.20.3 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: Red Hat Quay 3.14.6
Red Hat Quay 3.14.6 is now available with bug fixes.
Red Hat Security Advisory: Red Hat Quay 3.13.11
Red Hat Quay 3.13.11 is now available with bug fixes.
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.21.1
The 1.21.1 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.21.1
The 1.21.1 GA release of Red Hat OpenShift Pipelines Operator.. For more details see [product documentation](https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines).
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update
Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update
Red Hat Security Advisory: Red Hat Migration Toolkit for Containers
A new version of Migration Toolkit for Containers (MTC) is now available.
Red Hat Security Advisory: Red Hat OpenShift API for Data Protection
A new version of OpenShift API for Data Protection (OADP) is now available.

> GITHUB SECURITY ADVISORY

GHSA-f83f-xpx7-ffpw HIGH

Fulcio allocates excessive memory during token parsing

AFFECTED PACKAGES:
GO / github.com/sigstore/fulcio
<= 1.8.2
Fixed in: 1.8.3

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Fulcio allocates excessive memory during token parsing

AFFECTED PACKAGES:
Unknown / Unknown
41 versions affected
ALIASES:
GHSA-f83f-xpx7-ffpw, GO-2025-4193

> HISTORIQUE DES MODIFICATIONS

Première apparition
04/12/2025 22:15
Source: NVD
📊 ENRICHISSEMENT 19/01/2026 17:37
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
📊 ENRICHISSEMENT 01/01/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-405: Asymmetric Resource Consumption (Amplification) - The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources withou...
Total des modifications: 2 Dernière mise à jour: 9 months ago

> REFERENCES

https://github.com/sigstore/fulcio/commit/765a0e57608b9ef390e1eeeea8595b9054c63a...
https://github.com/sigstore/fulcio/security/advisories/GHSA-f83f-xpx7-ffpw
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