Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.15.4
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 7.5 High : upgrade Red Hat fulcio to 1.8.3 soon.
Data as of 6 Nov 2026, 07:07 UTC
- Patch
- Available – fixed in 1.8.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 4 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade github.com/sigstore/fulcio to 1.8.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Gogithub.com/sigstore/fulciopkg:golang/github.com/sigstore/fulcioOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in Red Hat OpenShift Pipelines Operator release 1.15.4. Users should upgrade to this version to remediate the vulnerability. No additional mitigations are specified or required beyond applying the official update.
Description
CVE-2025-66506 is a denial of service vulnerability in Fulcio, a free-to-use certificate authority used by Red Hat OpenShift Pipelines. The flaw allows resource exhaustion due to excessive memory allocation when processing a malicious OpenID Connect (OIDC) identity token containing numerous period characters. This can lead to service unavailability in affected Red Hat products that utilize Fulcio. The issue is addressed in the Red Hat OpenShift Pipelines Operator release 1.15.4.
References
- access.redhat.com/errata/RHSA-2026:3723 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-66506 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_openshift_pipelines (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_3723.json (opens in a new tab)