{"items":[{"id":"NVI-00017563","kind":"vulnerability","title":"Authelia Missing Username Canonicalization in Basic Auth (LDAP)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hjj4-hfjm-fmrj","CVE-2026-47203"],"plain_summary":"GitHub lists this reviewed advisory for github.com/authelia/authelia/v4. 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-20b989063557ffebf83f42ef5802249c"],"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-20b989063557ffebf83f42ef5802249c","url":"https://github.com/advisories/GHSA-hjj4-hfjm-fmrj","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hjj4-hfjm-fmrj","publisher":"GitHub Advisory Database","observed_at":"2026-11-05T19:05:04.022Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-20b989063557ffebf83f42ef5802249c"],"technology":"github.com/authelia/authelia/v4","known_exclusions":[],"conditions_summary":"### Impact\n\n**CVSSv4 Baseline Score:** Moderate 6.3\n\n**CVSSv4 Weighted Score:** Low 2.9\n\nThe full CVSSv4 Vector for this vulnerability is:\n\n> CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:L/IR:L/AR:L/MAV:N/MAC:H/MAT:N/MPR:N/MUI:N/MVC:L/MVI:N/MVA:N/MSC:N/MSI:N/MSA:N/S:N/AU:Y/R:U/V:D/RE:L/U:Green\n\n**CVSSv3.1 Baseline Score:** Low 3.7\n\n**CVSSv3.1 Overall Score:** Medium 4.0\n\nThe full CVSSv3.1 Vector equivalent for this vulnerability is:\n\n> CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:X/CR:H/IR:L/AR:L/MAV:N/MAC:H/MPR:N/MUI:N/MS:U/MC:L/MI:N/MA:N\n\nThe weighted severity rating is a result of no indication this is currently being exploited being available at the time of the publish date, in addition to the fact it's unlikely that it is being exploited currently.\n\nDue to lack of canonicalization of the basic auth username, the effectiveness of the brute force mechanism when using basic auth is partially degraded.\n\nMost passwords of reasonable length are unlikely to have a meaningful effect due to the fact there is no clear feedback to an attacker that is attempting to exploit this, thus their brute force attempts are significantly more likely to miss a v","public_affected_ranges":[">= 4.38.0, <= 4.39.19"]}],"null_published_at":"2026-11-05T19:10:21.416Z","source_updated_at":"2026-06-26T21:32:44.000Z","source_disclosed_at":"2026-05-29T21:21:12.000Z","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":"2026-11-05T19:05:04.022Z"}],"next_cursor":null,"snapshot_revision":"42594"}