Bug 2421879

Summary: CVE-2025-66506 apptainer: Fulcio: Denial of Service via crafted OpenID Connect (OIDC) token [epel-8]
Product: [Fedora] Fedora EPEL Reporter: Praise Ogwuche <pogwuche>
Component: apptainerAssignee: Dave Dykstra <dwd>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: epel8CC: dwd, go-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["01cd840e-f3b3-44e7-832f-1f6d38f7a549"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2025-12-15 15:38:59 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2419056    

Description Praise Ogwuche 2025-12-12 21:36:09 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Comment 1 Dave Dykstra 2025-12-15 15:38:59 UTC 
The vulnerable code isn't used, detailed in https://github.com/apptainer/apptainer/pull/3258#issuecomment-3618543302