Vulnerability-Lookup

GHSA-8C7H-7VM9-JHJ3

Vulnerability from github – Published: 2026-10-01 12:31 – Updated: 2026-10-07 00:31

Details

A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (rd) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.

Severity

6.1 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-83589"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-01T10:17:17Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.",
  "id": "GHSA-8c7h-7vm9-jhj3",
  "modified": "2026-10-07T00:31:32Z",
  "published": "2026-10-01T12:31:15Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83589"
    },
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      "url": "https://access.redhat.com/errata/RHSA-2026:74380"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:74383"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:74429"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-83589"
    },
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-83589 (GCVE-0-2026-83589)

Vulnerability from cvelistv5 – Published: 2026-10-01 09:17 – Updated: 2026-10-06 23:09

Title

Oauth-proxy: open redirect via /\ and /\t bypass in post-login redirect

Summary

A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.

Severity

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-01 16:11 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

redhat redhat root Scorecard

References

5 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:74380	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74383	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74429	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-83589	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2518379	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat OpenShift Container Platform 4.20	Unaffected: 1790704224 , < * (rpm) cpe:/a:redhat:openshift:4.20::el9
Red Hat	Red Hat OpenShift Container Platform 4.21	Unaffected: 1790706478 , < * (rpm) cpe:/a:redhat:openshift:4.21::el9
Red Hat	Red Hat OpenShift Container Platform 4.22	Unaffected: 1790724885 , < * (rpm) cpe:/a:redhat:openshift:4.22::el9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-08-31 20:00

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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-8C7H-7VM9-JHJ3

CVE-2026-83589 (GCVE-0-2026-83589)

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Nomenclature

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