RHSA-2026:1049
Vulnerability from csaf_redhat - Published: 2026-01-22 21:04 - Updated: 2026-10-06 04:14Summary
Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.21.0
Severity
Important
Notes
Topic: 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).
Details: The 1.21.0 release of Red Hat OpenShift Pipelines Operator.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Fulcio, a free-to-use certificate authority. This vulnerability allows a denial of service (DoS) due to excessive memory allocation when processing a malicious OpenID Connect (OIDC) identity token containing numerous period characters.
7.5 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-bundle@sha256:a5672822c8a59e50317d79a697d7e93c9fca27df13dcbd999c3c7a18475243a2_amd64 | — |
Vendor Fix
fix
|
Known not affected
12 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-proxy-rhel9@sha256:15d40f853744265a1f4f64e29d1da73056d87033faa393f17e2da75d19265008_arm64 | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-proxy-rhel9@sha256:25aeacd4b3dc9fdc04f3d88b128658c8574798d125efff9496f7a936d85ceb04_ppc64le | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-proxy-rhel9@sha256:65dda4d1773b5cbb5b192aea81186aacb8e200d5c033527fcc9b236125382df3_amd64 | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-proxy-rhel9@sha256:e3475b5cd64b0a9e597f31fe7b6a7847b2bf924ce4feb123ebbf8e3424938f67_s390x | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-webhook-rhel9@sha256:190f972cbf4951f32ccc666075c0c64751a98b4ac95f7b5762b39605084f4938_ppc64le | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-webhook-rhel9@sha256:511e668c1ffc13395f57cd53983b4ba6d76a7e4004d8a845bb940d86d775ada6_arm64 | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-webhook-rhel9@sha256:81280d1b2568f74e265a8ab579581b44843e6841be4aa55562df84298cceda99_s390x | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-operator-webhook-rhel9@sha256:b574aec30943382079ea6c60df7aacce77fe3caacf366a08fe2c37769061a1bd_amd64 | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:055d60f1ce44fdab089475c7fcbadb2764fdb453c05bba7ec918af82e4a2c7c1_amd64 | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:258f160b7fcb75aea2ebf51b9163c58eaad1dc0fbd9285a411564a5f93e8a190_ppc64le | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:87ee30c0e63990331d779ff146fc811bd385f352c7c1d5b57d6d06fac2867f7b_s390x | — | ||
| Unresolved product id: Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:bf1e73f5e9c64d63fa6c283617834f59d11c642ad92bf6ac08ebb0d4b0d2e089_arm64 | — |
Threats
Impact
Important
References
11 references
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"text": "A flaw was found in Fulcio, a free-to-use certificate authority. This vulnerability allows a denial of service (DoS) due to excessive memory allocation when processing a malicious OpenID Connect (OIDC) identity token containing numerous period characters.",
"title": "Vulnerability description"
},
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"title": "Vulnerability summary"
},
{
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"text": "This vulnerability is rated Important for Red Hat as Fulcio, a certificate authority used for issuing code signing certificates, is susceptible to a denial of service when processing a specially crafted OpenID Connect (OIDC) token. This could lead to resource exhaustion and service unavailability in affected Red Hat products that utilize Fulcio.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:258f160b7fcb75aea2ebf51b9163c58eaad1dc0fbd9285a411564a5f93e8a190_ppc64le",
"Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:87ee30c0e63990331d779ff146fc811bd385f352c7c1d5b57d6d06fac2867f7b_s390x",
"Red Hat OpenShift Pipelines 1.21:registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator@sha256:bf1e73f5e9c64d63fa6c283617834f59d11c642ad92bf6ac08ebb0d4b0d2e089_arm64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "github.com/sigstore/fulcio: Fulcio: Denial of Service via crafted OpenID Connect (OIDC) token"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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