{"items":[{"id":"NVI-00016379","kind":"vulnerability","title":"nginx ignition has  ParseAcceptLanguage `_` separator bypass that enables ~75x CPU amplification via Accept-Language header in i18nMiddleware","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jr34-h97m-9hpx","CVE-2026-61629"],"plain_summary":"GitHub lists this reviewed advisory for github.com/lucasdillmann/nginx-ignition. 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-6c773db81f2c56923daa0b0e8fdd6644"],"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":"2026-09-21T21:49:33.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6c773db81f2c56923daa0b0e8fdd6644"}],"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-6c773db81f2c56923daa0b0e8fdd6644","url":"https://github.com/advisories/GHSA-jr34-h97m-9hpx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jr34-h97m-9hpx","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:31.527Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6c773db81f2c56923daa0b0e8fdd6644"],"technology":"github.com/lucasdillmann/nginx-ignition","known_exclusions":[],"conditions_summary":"### Summary\n\nThe gin i18n middleware in nginx-ignition's API server runs in front of every HTTP request and calls `golang.org/x/text/language.ParseAcceptLanguage` on the raw `Accept-Language` header without imposing any size or shape filter. The underlying parser has quadratic-time behaviour on long lists of malformed language tags. The CVE-2022-32149 guard that golang.org/x/text added in v0.3.8 caps the number of `-` characters in the input at 1000, but it does not cap `_` characters even though the parser's internal scanner aliases `_` to `-` before parsing. A single unauthenticated GET request with an `Accept-Language` header built out of `_` separators burns about 2.4 seconds of server CPU on the host running nginx-ignition; ten concurrent attackers saturate a ten-core box for the duration of the attack while consuming ~10 MiB/s of upstream bandwidth.\n\n### Affected versions\n\n`dillmann.com.br/nginx-ignition` v2.40.0 and (per code inspection of `main`) earlier 2.x versions whose `api/common/server/i18n.go` middleware routes the `Accept-Language` header through `language.ParseAcceptLanguage` without imposing its own size or character filter. Verified on:\n\n- the official `dillmann/","public_affected_ranges":[">= 0.0.0-20260126024607-cbaf0fc16ed8, < 0.0.0-20260526022344-0c988fc1277c"]}],"null_published_at":"2026-11-04T10:04:27.938Z","source_updated_at":"2026-09-21T21:49:33.000Z","source_disclosed_at":"2026-09-21T21:49:03.000Z","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":"2026-11-01T14:29:31.527Z"}],"next_cursor":null,"snapshot_revision":"42594"}