Vulnerability-Lookup

GHSA-XFH5-8FX4-3CRM

Vulnerability from github – Published: 2026-10-01 18:32 – Updated: 2026-10-01 18:32

Details

A flaw was found in the X.509 client certificate authenticator of Keycloak. When CRL Distribution Point checking is enabled, the server fails to properly validate the file paths provided in a client certificate. An attacker can provide a specially crafted certificate that causes the server to attempt to read sensitive files from the local system or exhaust memory by loading extremely large files, potentially leading to information disclosure or a system crash.

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

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  "aliases": [
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    "severity": "MODERATE"
  },
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  "id": "GHSA-xfh5-8fx4-3crm",
  "modified": "2026-10-01T18:32:47Z",
  "published": "2026-10-01T18:32:47Z",
  "references": [
    {
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103884"
    },
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    }
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  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-103884 (GCVE-0-2026-103884)

Vulnerability from cvelistv5 – Published: 2026-10-01 17:16 – Updated: 2026-10-01 18:02

Title

Keycloak-services: keycloak-services: path traversal in x.509 crl distribution point allows arbitrary local file read

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-01 18:02 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

redhat redhat root Scorecard

References

1 reference

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-103884	vdb-entryx_refsource_REDHAT

Impacted products

2 products

Vendor	Product	Version
Red Hat	Red Hat Build of Keycloak	cpe:/a:redhat:build_keycloak:
Red Hat	Red Hat Single Sign-On 7	cpe:/a:redhat:red_hat_single_sign_on:7

Date Public

2026-09-30 13:25

Credits

Red Hat would like to thank Robin Marchand for reporting this issue.

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                "timestamp": "2026-10-01T18:02:05.858472Z",
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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.

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.

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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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GHSA-XFH5-8FX4-3CRM

CVE-2026-103884 (GCVE-0-2026-103884)

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Sightings

Nomenclature

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