{"items":[{"id":"NVI-00009038","kind":"vulnerability","title":"joserfc: Compact JWS size guard allocates attacker-controlled segments before rejection","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9pg5-8c7x-5hfx","CVE-2026-119284"],"plain_summary":"GitHub lists this reviewed advisory for joserfc. 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-4a112ce72f22afa90c44c1e1120c6067"],"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":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.192%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.08912. Missing scores are unknown.","source_id":"sr-4a112ce72f22afa90c44c1e1120c6067"}],"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-852a26f39067b8153283048ae4cf9df1","url":"https://github.com/advisories/GHSA-9pg5-8c7x-5hfx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9pg5-8c7x-5hfx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-4a112ce72f22afa90c44c1e1120c6067","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-2026-119284","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.375Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-852a26f39067b8153283048ae4cf9df1"],"technology":"joserfc","known_exclusions":[],"conditions_summary":"## Summary\n\njoserfc 1.7.4 defines compact-JWS header, payload, and signature limits, but\ncalls `value.split(b\".\")` before validating them. Python `bytes.split()` copies\nthe attacker-controlled segments, so the current guard allocates roughly one\ncomplete payload before rejecting it.\n\n## Reproduction\n\n```bash\n.venv-research/bin/python 06-practical-testing/preauth-memory-profile.py\n```\n\nThe input is resident before a fork-isolated verifier runs, and every signature\nis invalid.\n\n| Input | Peak RSS delta | Amplification | Result |\n|---:|---:|---:|---|\n| 1 MiB | 1.11 MiB | 1.11× | size rejected |\n| 4 MiB | 4.04 MiB | 1.01× | size rejected |\n| 8 MiB | 8.04 MiB | 1.01× | size rejected |\n| 16 MiB | 16.04 MiB | 1.00× | size rejected |\n| 32 MiB | 31.74 MiB | 0.99× | size rejected |\n| 64 MiB | 63.80 MiB | 1.00× | size rejected |\n\nThe unconstrained profile is the primary evidence: joserfc allocates an\nadditional attacker-sized object before producing its intended\n`ExceededSizeError`. A separate baseline-plus-headroom stress test raises\n`MemoryError` when that copy cannot fit, but this report does not characterize\nan absolute `RLIMIT_AS` value as a realistic worker memory budget.\n\n## Security A","public_affected_ranges":["< 1.7.6"]}],"null_published_at":"2026-10-31T23:18:17.262Z","source_updated_at":"2026-10-30T14:54:26.000Z","source_disclosed_at":"2026-10-30T14:54:25.000Z","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":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00009038","kind":"vulnerability","title":"joserfc: Compact JWS size guard allocates attacker-controlled segments before rejection","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9pg5-8c7x-5hfx","CVE-2026-119284"],"plain_summary":"GitHub lists this reviewed advisory for joserfc. 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-852a26f39067b8153283048ae4cf9df1"],"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-852a26f39067b8153283048ae4cf9df1","url":"https://github.com/advisories/GHSA-9pg5-8c7x-5hfx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9pg5-8c7x-5hfx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-852a26f39067b8153283048ae4cf9df1"],"technology":"joserfc","known_exclusions":[],"conditions_summary":"## Summary\n\njoserfc 1.7.4 defines compact-JWS header, payload, and signature limits, but\ncalls `value.split(b\".\")` before validating them. Python `bytes.split()` copies\nthe attacker-controlled segments, so the current guard allocates roughly one\ncomplete payload before rejecting it.\n\n## Reproduction\n\n```bash\n.venv-research/bin/python 06-practical-testing/preauth-memory-profile.py\n```\n\nThe input is resident before a fork-isolated verifier runs, and every signature\nis invalid.\n\n| Input | Peak RSS delta | Amplification | Result |\n|---:|---:|---:|---|\n| 1 MiB | 1.11 MiB | 1.11× | size rejected |\n| 4 MiB | 4.04 MiB | 1.01× | size rejected |\n| 8 MiB | 8.04 MiB | 1.01× | size rejected |\n| 16 MiB | 16.04 MiB | 1.00× | size rejected |\n| 32 MiB | 31.74 MiB | 0.99× | size rejected |\n| 64 MiB | 63.80 MiB | 1.00× | size rejected |\n\nThe unconstrained profile is the primary evidence: joserfc allocates an\nadditional attacker-sized object before producing its intended\n`ExceededSizeError`. A separate baseline-plus-headroom stress test raises\n`MemoryError` when that copy cannot fit, but this report does not characterize\nan absolute `RLIMIT_AS` value as a realistic worker memory budget.\n\n## Security A","public_affected_ranges":["< 1.7.6"]}],"null_published_at":"2026-10-31T22:13:31.268Z","source_updated_at":"2026-10-30T14:54:26.000Z","source_disclosed_at":"2026-10-30T14:54:25.000Z","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":"2026-10-31T21:55:49.621Z"}],"next_cursor":null,"snapshot_revision":"42594"}