{"items":[{"id":"NVI-00016246","kind":"vulnerability","title":"Gogs's Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-3w28-36p9-w929","CVE-2026-52816"],"plain_summary":"GitHub lists this reviewed advisory for gogs.io/gogs. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-504b76fd5202a9365895ea1cf5890311"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-25T21:16:27.447Z","value":"5.4 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-504b76fd5202a9365895ea1cf5890311"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-5573a9bb054b36a3b75de8a5ed3eadbc","url":"https://github.com/advisories/GHSA-3w28-36p9-w929","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3w28-36p9-w929","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:35:18.117Z"},{"id":"sr-504b76fd5202a9365895ea1cf5890311","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52816","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-52816","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:47:57.993Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5573a9bb054b36a3b75de8a5ed3eadbc"],"technology":"gogs.io/gogs","known_exclusions":[],"conditions_summary":"## Summary\n\nThe Jupyter Notebook (ipynb) sanitizer endpoint at `POST /-/api/sanitize_ipynb` allows arbitrary `data:` URIs without proper restrictions, potentially leading to Cross-Site Scripting (XSS). The endpoint uses `bluemonday.UGCPolicy()` with `p.AllowURLSchemes(\"data\")` which permits all data URI schemes including `data:text/html`, enabling attackers to inject malicious HTML/JavaScript. Additionally, the endpoint has no authentication middleware, allowing any registered user to exploit this vulnerability.\n\n## Severity\n\n**High**\n\n## Affected Versions\n\nAll versions using the vulnerable endpoint\n\n## Vulnerability Details\n\n- **CVE ID**: (To be assigned)\n- **Entry Point**: `POST /-/api/sanitize_ipynb`\n- **Attack Vector**: Network\n- **Authentication Required**: No (only needs a registered user account)\n\n## Impact\n\nAn attacker with a registered user account can:\n\n- Send malicious HTML containing `data:text/html` URIs to the sanitization endpoint\n- Receive sanitized but attacker-controlled HTML in the response\n- Execute arbitrary JavaScript in the attacker's browser context through XSS\n- Potentially exploit other users if the sanitized output is rendered in their context\n\nThe vulner","public_affected_ranges":["< 0.14.3"]}],"null_published_at":"2026-11-08T19:53:44.057Z","source_updated_at":"2026-07-21T13:17:21.000Z","source_disclosed_at":"2026-06-23T17:33:32.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T22:35:18.117Z"},{"id":"NVI-00016246","kind":"vulnerability","title":"Gogs's Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3w28-36p9-w929","CVE-2026-52816"],"plain_summary":"GitHub lists this reviewed advisory for gogs.io/gogs. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-5573a9bb054b36a3b75de8a5ed3eadbc"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-5573a9bb054b36a3b75de8a5ed3eadbc","url":"https://github.com/advisories/GHSA-3w28-36p9-w929","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3w28-36p9-w929","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:35:18.117Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5573a9bb054b36a3b75de8a5ed3eadbc"],"technology":"gogs.io/gogs","known_exclusions":[],"conditions_summary":"## Summary\n\nThe Jupyter Notebook (ipynb) sanitizer endpoint at `POST /-/api/sanitize_ipynb` allows arbitrary `data:` URIs without proper restrictions, potentially leading to Cross-Site Scripting (XSS). The endpoint uses `bluemonday.UGCPolicy()` with `p.AllowURLSchemes(\"data\")` which permits all data URI schemes including `data:text/html`, enabling attackers to inject malicious HTML/JavaScript. Additionally, the endpoint has no authentication middleware, allowing any registered user to exploit this vulnerability.\n\n## Severity\n\n**High**\n\n## Affected Versions\n\nAll versions using the vulnerable endpoint\n\n## Vulnerability Details\n\n- **CVE ID**: (To be assigned)\n- **Entry Point**: `POST /-/api/sanitize_ipynb`\n- **Attack Vector**: Network\n- **Authentication Required**: No (only needs a registered user account)\n\n## Impact\n\nAn attacker with a registered user account can:\n\n- Send malicious HTML containing `data:text/html` URIs to the sanitization endpoint\n- Receive sanitized but attacker-controlled HTML in the response\n- Execute arbitrary JavaScript in the attacker's browser context through XSS\n- Potentially exploit other users if the sanitized output is rendered in their context\n\nThe vulner","public_affected_ranges":["< 0.14.3"]}],"null_published_at":"2026-11-04T10:04:27.922Z","source_updated_at":"2026-07-21T13:17:21.000Z","source_disclosed_at":"2026-06-23T17:33:32.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T22:35:18.117Z"}],"next_cursor":null,"snapshot_revision":"42594"}