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5.8
Fulcio-fips may accept forged signatures
published 5 days ago
Summary
The Fulcio-fips component used in sigstore services can be fooled into trusting invalid digital signatures. This could let attackers make it appear that code or files are authentic when they are not. Update to the latest Fulcio-fips release or apply the vendor's recommended patch as soon as possible.
What to do
- Update cleanstart fulcio-fips to version 1.5.1-r1.
- Update cleanstart fulcio-fips to version 1.5.1-r2.
- Update cleanstart fulcio-fips to version 1.6.6-r1.
- Update cleanstart fulcio-fips to version 1.6.6-r2.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| CleanStart | cleanstart | fulcio-fips |
< 1.5.1-r1 < 1.5.1-r2 < 1.6.6-r1 < 1.6.6-r2 Fix: upgrade to 1.5.1-r1
|
Original advisory text
sigstore framework is a common go library shared across sigstore services and clients
Security vulnerability affects the fulcio-fips package. sigstore framework is a common go library shared across sigstore services and clients.
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Timeline
Published30 Oct 2026
Updated31 Oct 2026
First seen31 Oct 2026
Sources
CLEANSTART-2026-XT33910 · OSV
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