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Rucio WebUI has Stored Cross-site Scripting (XSS) in RSE Metadata

Type: advisorySources: OSV

Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the RSE metadata of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-25734
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 02:26 UTC · Revision 1

Source evidence

Rucio WebUI has Stored Cross-site Scripting (XSS) in RSE Metadata

core-osv · Original source

Published 25 Feb 2026, 19:33 UTC

Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the RSE metadata of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.

osv:CVE-2026-25734
Complete source record
{
  "id": "00117fc351856bee0c2a608d06583c6ec58231b9180bc6136e93bdbc4cd3bd74",
  "url": "https://osv.dev/vulnerability/CVE-2026-25734",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Rucio WebUI has Stored Cross-site Scripting (XSS) in RSE Metadata",
    "summary": "Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the RSE metadata of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.",
    "evidence": "osv:CVE-2026-25734",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-25734",
      "aliases": [
        "CVE-2026-25734",
        "GHSA-h9fp-p2p9-873q",
        "PYSEC-2026-3057"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rucio/rucio",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ba9203702629af7bb1f95d5cf9ba8fcf1f943105"
                },
                {
                  "introduced": "46cc73438ba4042ac937fff1c5a0dfabc83e91f3"
                },
                {
                  "fixed": "c851ad216e0e0e3d50405eab3331dfe21c96ddd3"
                },
                {
                  "introduced": "45b19709d28ecccc39cd0e73e4087a7e79a71c49"
                },
                {
                  "fixed": "ba2a7e66b1e3c73b5cf9e0000e6621e8dc45bfe7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cern:rucio:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "35.8.3"
                      }
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                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:cern:rucio:*:*:*:*:*:*:*:*",
                    "range": [
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                        "introduced": "36.0.0"
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                      {
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                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:cern:rucio:*:*:*:*:*:*:*:*",
                    "range": [
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                        "introduced": "39.0.0"
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                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
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                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "35.8.3"
                  },
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                    "range": [
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                        "fixed": "c851ad216e0e0e3d50405eab3331dfe21c96ddd3"
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                    "source": "REFERENCES_TAG",
                    "original_tag": "38.5.4"
                  },
                  {
                    "range": [
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                        "fixed": "ba2a7e66b1e3c73b5cf9e0000e6621e8dc45bfe7"
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                    "source": "REFERENCES_TAG",
                    "original_tag": "39.3.1"
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                ]
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          ],
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25734.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.263418342Z",
      "provider": "osv",
      "references": [
        "https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html",
        "https://github.com/rucio/rucio/releases/tag/35.8.3",
        "https://github.com/rucio/rucio/releases/tag/38.5.4",
        "https://github.com/rucio/rucio/releases/tag/39.3.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25734.json",
        "https://github.com/rucio/rucio/security/advisories/GHSA-h9fp-p2p9-873q",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-25734"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1004",
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25734.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-25734",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517347,
  "published_at": "2026-02-25T19:33:44.627+00:00"
}