Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-06-23 14:37

Modified

2026-09-10 15:46

Summary

Apache APISIX: cas-auth login CSRF / session injection issue

Details

Cross-Site Request Forgery (CSRF) vulnerability in the cas-auth plugin under default configurations.

This defect allows a remote attacker that manages to send a victim to a webpage controlled by them can cause the victim's browser to become authenticated as a different identity.

Actions the victim takes upstream are then attributed to attackers identity.

This issue affects Apache APISIX: from 3.0.0 through 3.16.0.

Users are recommended to upgrade to version 3.17.0, which fixes the issue.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "apisix",
        "purl": "pkg:bitnami/apisix"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.17.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49871"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*"
    ],
    "severity": "Critical"
  },
  "details": "Cross-Site Request Forgery (CSRF) vulnerability in the cas-auth plugin under default configurations.\n\nThis defect allows a\u00a0remote attacker that manages to send a victim to a webpage controlled by them can cause the victim\u0027s browser to become authenticated as a different identity.\n\nActions the victim takes upstream are then attributed to attackers identity.\n\n\nThis issue affects Apache APISIX: from 3.0.0 through 3.16.0.\n\nUsers are recommended to upgrade to version 3.17.0, which fixes the issue.",
  "id": "BIT-apisix-2026-49871",
  "modified": "2026-09-10T15:46:03.895Z",
  "published": "2026-06-23T14:37:51.705Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/19/14"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/1ozsnss0lof4gpwq763d66oxwxt3sycp"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49871"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache APISIX: cas-auth login CSRF / session injection issue"
}

CVE-2026-49871 (GCVE-0-2026-49871)

Vulnerability from cvelistv5 – Published: 2026-06-19 13:18 – Updated: 2026-06-22 16:21

Title

Apache APISIX: cas-auth login CSRF / session injection issue

Summary

Cross-Site Request Forgery (CSRF) vulnerability in the cas-auth plugin under default configurations. This defect allows a remote attacker that manages to send a victim to a webpage controlled by them can cause the victim's browser to become authenticated as a different identity. Actions the victim takes upstream are then attributed to attackers identity. This issue affects Apache APISIX: from 3.0.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-22 16:21 UTC

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/1ozsnss0lof4gpwq7…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache APISIX	Affected: 3.0.0 , ≤ 3.16.0 (semver)

Credits

lokerxxx

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-19T16:49:57.460Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
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          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-49871",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-22T16:21:21.141230Z",
                "version": "2.0.3"
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              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-22T16:21:31.946Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
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          "vendor": "Apache Software Foundation",
          "versions": [
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              "version": "3.0.0",
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            }
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        }
      ],
      "credits": [
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        }
      ],
      "descriptions": [
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            "providerUrgency": "NOT_DEFINED",
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            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
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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.

Detection rules are retrieved from Rulezet.

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.

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.