{"items":[{"id":"NVI-00011934","kind":"vulnerability","title":"Vikunja: Link-share principal ID collision allows cross-account API token issuance and management","revision":4,"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-vvcv-vpph-h844","CVE-2026-68581"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. 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-07fadb7c25e2bc798b48fb629dcb3fcd"],"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":"2026-10-09T20:42:16.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6378c855ae3c8b54de866064b6432021"},{"kind":"CVSS","as_of":"2026-10-23T22:10:00.160Z","value":"8.1 HIGH (3.1)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-35c9c59a75a3af581bea69cfbc819e78"},{"kind":"CVSS","as_of":"2026-10-23T22:10:00.160Z","value":"8.6 HIGH (4.0)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-35c9c59a75a3af581bea69cfbc819e78"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.464%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.40311. Missing scores are unknown.","source_id":"sr-07fadb7c25e2bc798b48fb629dcb3fcd"}],"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-6378c855ae3c8b54de866064b6432021","url":"https://github.com/advisories/GHSA-vvcv-vpph-h844","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vvcv-vpph-h844","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-35c9c59a75a3af581bea69cfbc819e78","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68581","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-68581","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:58:41.978Z"},{"id":"sr-07fadb7c25e2bc798b48fb629dcb3fcd","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-68581","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.061Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6378c855ae3c8b54de866064b6432021"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"Executive Summary\n\nVikunja accepts both regular-user JSON Web Tokens (JWTs) and link-share JWTs through its generic authenticated API route group. A link-share JWT resolves to a `models.LinkSharing` principal whose `GetID()` method returns the numeric `link_shares.id`. The API-token management model then treats that generic numeric value as a `users.id` when it creates, lists, and deletes API tokens.\n\nBecause `users.id` and `link_shares.id` are independent positive sequences, a link share whose ID equals another user's ID is treated as that user by `/api/v1/tokens`. An ordinary authenticated attacker can obtain a target's numeric user ID through authenticated user search and create link shares on an attacker-writable project until the link-share sequence reaches that value. The colliding link-share principal can then list the target's API-token metadata, issue a new API token owned by the target, and delete target-owned API tokens. The newly issued token operates with attacker-selected valid API scopes under the target user's existing permissions.\n\nI reviewed the vulnerable `v2.3.0` source, the introducing commit, the stable tag history, and the inspected main revision directly. I ","public_affected_ranges":[">= 0.22.0, <= 2.3.0"]}],"null_published_at":"2026-11-06T07:24:11.284Z","source_updated_at":"2026-10-09T20:42:16.000Z","source_disclosed_at":"2026-10-09T20:42:14.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T00:58:23.763Z"},{"id":"NVI-00011934","kind":"vulnerability","title":"Vikunja: Link-share principal ID collision allows cross-account API token issuance and management","revision":3,"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-vvcv-vpph-h844","CVE-2026-68581"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. 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-77a83ab14f59d1c2fc05e9d88682a063"],"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":"2026-10-09T20:42:16.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6378c855ae3c8b54de866064b6432021"},{"kind":"CVSS","as_of":"2026-10-23T22:10:00.160Z","value":"8.1 HIGH (3.1)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-35c9c59a75a3af581bea69cfbc819e78"},{"kind":"CVSS","as_of":"2026-10-23T22:10:00.160Z","value":"8.6 HIGH (4.0)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-35c9c59a75a3af581bea69cfbc819e78"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.464%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.40204. Missing scores are unknown.","source_id":"sr-77a83ab14f59d1c2fc05e9d88682a063"}],"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-6378c855ae3c8b54de866064b6432021","url":"https://github.com/advisories/GHSA-vvcv-vpph-h844","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vvcv-vpph-h844","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-35c9c59a75a3af581bea69cfbc819e78","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68581","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-68581","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:58:41.978Z"},{"id":"sr-77a83ab14f59d1c2fc05e9d88682a063","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-68581","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.085Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6378c855ae3c8b54de866064b6432021"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"Executive Summary\n\nVikunja accepts both regular-user JSON Web Tokens (JWTs) and link-share JWTs through its generic authenticated API route group. A link-share JWT resolves to a `models.LinkSharing` principal whose `GetID()` method returns the numeric `link_shares.id`. The API-token management model then treats that generic numeric value as a `users.id` when it creates, lists, and deletes API tokens.\n\nBecause `users.id` and `link_shares.id` are independent positive sequences, a link share whose ID equals another user's ID is treated as that user by `/api/v1/tokens`. An ordinary authenticated attacker can obtain a target's numeric user ID through authenticated user search and create link shares on an attacker-writable project until the link-share sequence reaches that value. The colliding link-share principal can then list the target's API-token metadata, issue a new API token owned by the target, and delete target-owned API tokens. The newly issued token operates with attacker-selected valid API scopes under the target user's existing permissions.\n\nI reviewed the vulnerable `v2.3.0` source, the introducing commit, the stable tag history, and the inspected main revision directly. I ","public_affected_ranges":[">= 0.22.0, <= 2.3.0"]}],"null_published_at":"2026-11-04T10:04:35.930Z","source_updated_at":"2026-10-09T20:42:16.000Z","source_disclosed_at":"2026-10-09T20:42:14.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-01T00:58:23.763Z"},{"id":"NVI-00011934","kind":"vulnerability","title":"Vikunja: Link-share principal ID collision allows cross-account API token issuance and management","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vvcv-vpph-h844","CVE-2026-68581"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. 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-77a83ab14f59d1c2fc05e9d88682a063"],"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":"2026-10-09T20:42:16.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6378c855ae3c8b54de866064b6432021"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.464%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.40204. Missing scores are unknown.","source_id":"sr-77a83ab14f59d1c2fc05e9d88682a063"}],"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-6378c855ae3c8b54de866064b6432021","url":"https://github.com/advisories/GHSA-vvcv-vpph-h844","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vvcv-vpph-h844","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-77a83ab14f59d1c2fc05e9d88682a063","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-68581","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.085Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6378c855ae3c8b54de866064b6432021"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"Executive Summary\n\nVikunja accepts both regular-user JSON Web Tokens (JWTs) and link-share JWTs through its generic authenticated API route group. A link-share JWT resolves to a `models.LinkSharing` principal whose `GetID()` method returns the numeric `link_shares.id`. The API-token management model then treats that generic numeric value as a `users.id` when it creates, lists, and deletes API tokens.\n\nBecause `users.id` and `link_shares.id` are independent positive sequences, a link share whose ID equals another user's ID is treated as that user by `/api/v1/tokens`. An ordinary authenticated attacker can obtain a target's numeric user ID through authenticated user search and create link shares on an attacker-writable project until the link-share sequence reaches that value. The colliding link-share principal can then list the target's API-token metadata, issue a new API token owned by the target, and delete target-owned API tokens. The newly issued token operates with attacker-selected valid API scopes under the target user's existing permissions.\n\nI reviewed the vulnerable `v2.3.0` source, the introducing commit, the stable tag history, and the inspected main revision directly. I ","public_affected_ranges":[">= 0.22.0, <= 2.3.0"]}],"null_published_at":"2026-11-03T10:03:21.813Z","source_updated_at":"2026-10-09T20:42:16.000Z","source_disclosed_at":"2026-10-09T20:42:14.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T00:58:23.763Z"},{"id":"NVI-00011934","kind":"vulnerability","title":"Vikunja: Link-share principal ID collision allows cross-account API token issuance and management","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vvcv-vpph-h844","CVE-2026-68581"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. 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-6378c855ae3c8b54de866064b6432021"],"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":"2026-10-09T20:42:16.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6378c855ae3c8b54de866064b6432021"}],"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-6378c855ae3c8b54de866064b6432021","url":"https://github.com/advisories/GHSA-vvcv-vpph-h844","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vvcv-vpph-h844","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6378c855ae3c8b54de866064b6432021"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"Executive Summary\n\nVikunja accepts both regular-user JSON Web Tokens (JWTs) and link-share JWTs through its generic authenticated API route group. A link-share JWT resolves to a `models.LinkSharing` principal whose `GetID()` method returns the numeric `link_shares.id`. The API-token management model then treats that generic numeric value as a `users.id` when it creates, lists, and deletes API tokens.\n\nBecause `users.id` and `link_shares.id` are independent positive sequences, a link share whose ID equals another user's ID is treated as that user by `/api/v1/tokens`. An ordinary authenticated attacker can obtain a target's numeric user ID through authenticated user search and create link shares on an attacker-writable project until the link-share sequence reaches that value. The colliding link-share principal can then list the target's API-token metadata, issue a new API token owned by the target, and delete target-owned API tokens. The newly issued token operates with attacker-selected valid API scopes under the target user's existing permissions.\n\nI reviewed the vulnerable `v2.3.0` source, the introducing commit, the stable tag history, and the inspected main revision directly. I ","public_affected_ranges":[">= 0.22.0, <= 2.3.0"]}],"null_published_at":"2026-11-01T01:03:56.616Z","source_updated_at":"2026-10-09T20:42:16.000Z","source_disclosed_at":"2026-10-09T20:42:14.000Z","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":"2026-11-01T00:58:23.763Z"}],"next_cursor":null,"snapshot_revision":"42594"}