{"id":"GHSA-vf5j-r2hw-2hrw","aliases":["GO-2026-4447"],"status":"published","title":"OpenCloud Affected by Public Link Exploit","description":"### Impact\n\nA security issue was discovered in [Reva](https://github.com/opencloud-eu/reva) that enables a malicious user to bypass the scope validation of a public link. That allows it to access resources outside the scope of a public link.\n\nOpenCloud uses Reva as one of its core components and thus it is affected.\n\n### Patches\n\nUpdate to OpenCloud version \u003e= 4.0.3 (stable release)\nUpdate to OpenCloud version \u003e= 5.0.2 (rolling release)\n\n### Workarounds\n\nIf projects are unable to update immediately, please implement the following security configuration to disable public link shares temporarily until the final solution for this problem is rolled out.\n\n#### Configuration Adjustment\n\n* Docker Compose: Edit the docker-compose.yml and add `GATEWAY_STORAGE_PUBLIC_LINK_ENDPOINT=“”` (empty string value) in the `environment` section of the `opencloud` container.\n\n\n#### Verification of Mitigation\n\nExecute the following test: \n- Create a public link for testing. \n- Open the link url in a private (no active login) browser tab. \n- An error page with “unknown error” will be displayed.\n\nThis configuration provides immediate protection and should be implemented immediately. Configuration mitigation is available. It mitigates the problem completely.\n\n### For more information\n\nIf there are questions or comments about this advisory:\n\n- Security Support: [security@opencloud.eu](mailto:security@opencloud.eu)\n- Technical Support: [support@opencloud.eu](mailto:support@opencloud.eu)","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2026-02-05T21:29:26Z","modified":"2026-02-19T20:41:25Z","fixes":[{"ecosystem":"Go","package":"github.com/opencloud-eu/opencloud","fixed_in":["4.0.3","5.0.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/opencloud-eu/opencloud","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.3"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/opencloud-eu/opencloud","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.0.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/opencloud-eu/opencloud","ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.0.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/opencloud-eu/opencloud","ranges":[{"type":"SEMVER","events":[{"introduced":"5.0.0"},{"fixed":"5.0.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/opencloud-eu/opencloud","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]}],"references":[{"url":"https://github.com/opencloud-eu/opencloud/security/advisories/GHSA-vf5j-r2hw-2hrw","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-vf5j-r2hw-2hrw"},{"url":"https://github.com/opencloud-eu/opencloud","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-vf5j-r2hw-2hrw","title":"OpenCloud Affected by Public Link Exploit","description":"### Impact\n\nA security issue was discovered in [Reva](https://github.com/opencloud-eu/reva) that enables a malicious user to bypass the scope validation of a public link. That allows it to access resources outside the scope of a public link.\n\nOpenCloud uses Reva as one of its core components and thus it is affected.\n\n### Patches\n\nUpdate to OpenCloud version \u003e= 4.0.3 (stable release)\nUpdate to OpenCloud version \u003e= 5.0.2 (rolling release)\n\n### Workarounds\n\nIf projects are unable to update immediately, please implement the following security configuration to disable public link shares temporarily until the final solution for this problem is rolled out.\n\n#### Configuration Adjustment\n\n* Docker Compose: Edit the docker-compose.yml and add `GATEWAY_STORAGE_PUBLIC_LINK_ENDPOINT=“”` (empty string value) in the `environment` section of the `opencloud` container.\n\n\n#### Verification of Mitigation\n\nExecute the following test: \n- Create a public link for testing. \n- Open the link url in a private (no active login) browser tab. \n- An error page with “unknown error” will be displayed.\n\nThis configuration provides immediate protection and should be implemented immediately. Configuration mitigation is available. It mitigates the problem completely.\n\n### For more information\n\nIf there are questions or comments about this advisory:\n\n- Security Support: [security@opencloud.eu](mailto:security@opencloud.eu)\n- Technical Support: [support@opencloud.eu](mailto:support@opencloud.eu)","status":"published","published":"2026-02-05T21:29:26Z","modified":"2026-02-05T21:29:27Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:39:23.728882Z"}],"osv":[{"id":"GHSA-vf5j-r2hw-2hrw","title":"OpenCloud Affected by Public Link Exploit","description":"### Impact\n\nA security issue was discovered in [Reva](https://github.com/opencloud-eu/reva) that enables a malicious user to bypass the scope validation of a public link. That allows it to access resources outside the scope of a public link.\n\nOpenCloud uses Reva as one of its core components and thus it is affected.\n\n### Patches\n\nUpdate to OpenCloud version \u003e= 4.0.3 (stable release)\nUpdate to OpenCloud version \u003e= 5.0.2 (rolling release)\n\n### Workarounds\n\nIf projects are unable to update immediately, please implement the following security configuration to disable public link shares temporarily until the final solution for this problem is rolled out.\n\n#### Configuration Adjustment\n\n* Docker Compose: Edit the docker-compose.yml and add `GATEWAY_STORAGE_PUBLIC_LINK_ENDPOINT=“”` (empty string value) in the `environment` section of the `opencloud` container.\n\n\n#### Verification of Mitigation\n\nExecute the following test: \n- Create a public link for testing. \n- Open the link url in a private (no active login) browser tab. \n- An error page with “unknown error” will be displayed.\n\nThis configuration provides immediate protection and should be implemented immediately. Configuration mitigation is available. It mitigates the problem completely.\n\n### For more information\n\nIf there are questions or comments about this advisory:\n\n- Security Support: [security@opencloud.eu](mailto:security@opencloud.eu)\n- Technical Support: [support@opencloud.eu](mailto:support@opencloud.eu)","status":"published","published":"2026-02-05T21:29:26Z","modified":"2026-02-19T20:41:25.725203Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:56.981655Z"},{"id":"GO-2026-4447","title":"OpenCloud Affected by Public Link Exploit in github.com/opencloud-eu/opencloud","description":"OpenCloud Affected by Public Link Exploit in github.com/opencloud-eu/opencloud.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/opencloud-eu/opencloud from v4.0.0 before v4.0.3, from v5.0.0 before v5.0.2.","status":"published","published":"2026-02-17T18:09:06Z","modified":"2026-02-19T20:41:25.725203Z","updated_at":"2026-11-02T15:47:02.011123Z"}]}}