{"items":[{"id":"NVI-00011761","kind":"vulnerability","title":"Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress","revision":2,"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-259r-337f-4rfw","CVE-2026-63209"],"plain_summary":"GitHub lists this reviewed advisory for github.com/klauspost/compress. 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-52f8b3c1651bfce4f0acc73d99ab87e6"],"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":"2026-10-20T14:33:35.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-1d839f3db23582e2db04be08c95b5284"},{"kind":"CVSS","as_of":"2026-09-30T19:57:08.043Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-52f8b3c1651bfce4f0acc73d99ab87e6"}],"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-1d839f3db23582e2db04be08c95b5284","url":"https://github.com/advisories/GHSA-259r-337f-4rfw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-259r-337f-4rfw","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:39.183Z"},{"id":"sr-52f8b3c1651bfce4f0acc73d99ab87e6","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63209","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-63209","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T02:47:38.696Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1d839f3db23582e2db04be08c95b5284"],"technology":"github.com/klauspost/compress","known_exclusions":[],"conditions_summary":"# Signed Integer Overflow in s2.NewDict\n\n## Summary\n\nA signed integer overflow vulnerability in `s2.NewDict()` allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding `MaxInt64`. When `Dict.Encode()` is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via `unsafe.Pointer` arithmetic, crashing the process with SIGSEGV.\n\n## Package\n\n- **Name:** `github.com/klauspost/compress/s2`\n- **Ecosystem:** Go\n- **Affected versions:**  len(dict) {\n    return nil\n}\n```\n\nWhen `r` exceeds `MaxInt64` (9223372036854775807), `int(r)` overflows to a negative value. Since a negative number is never greater than a positive length, the validation check is bypassed.\n\nW","public_affected_ranges":["<= 1.18.6"]}],"null_published_at":"2026-11-05T19:10:23.268Z","source_updated_at":"2026-10-20T14:33:35.000Z","source_disclosed_at":"2026-10-20T14:33:33.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T23:13:39.183Z"},{"id":"NVI-00011761","kind":"vulnerability","title":"Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-259r-337f-4rfw","CVE-2026-63209"],"plain_summary":"GitHub lists this reviewed advisory for github.com/klauspost/compress. 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-1d839f3db23582e2db04be08c95b5284"],"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":"2026-10-20T14:33:35.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-1d839f3db23582e2db04be08c95b5284"}],"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-1d839f3db23582e2db04be08c95b5284","url":"https://github.com/advisories/GHSA-259r-337f-4rfw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-259r-337f-4rfw","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:39.183Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1d839f3db23582e2db04be08c95b5284"],"technology":"github.com/klauspost/compress","known_exclusions":[],"conditions_summary":"# Signed Integer Overflow in s2.NewDict\n\n## Summary\n\nA signed integer overflow vulnerability in `s2.NewDict()` allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding `MaxInt64`. When `Dict.Encode()` is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via `unsafe.Pointer` arithmetic, crashing the process with SIGSEGV.\n\n## Package\n\n- **Name:** `github.com/klauspost/compress/s2`\n- **Ecosystem:** Go\n- **Affected versions:**  len(dict) {\n    return nil\n}\n```\n\nWhen `r` exceeds `MaxInt64` (9223372036854775807), `int(r)` overflows to a negative value. Since a negative number is never greater than a positive length, the validation check is bypassed.\n\nW","public_affected_ranges":["<= 1.18.6"]}],"null_published_at":"2026-11-01T01:03:56.601Z","source_updated_at":"2026-10-20T14:33:35.000Z","source_disclosed_at":"2026-10-20T14:33:33.000Z","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":"2026-10-31T23:13:39.183Z"}],"next_cursor":null,"snapshot_revision":"42594"}