{"items":[{"id":"NVI-00016359","kind":"vulnerability","title":"fflate unzipSync can enter an infinite loop when parsing malformed ZIP64 archives","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-px8p-9vwx-vf98","CVE-2026-45820"],"plain_summary":"GitHub lists this reviewed advisory for fflate, fflate, fflate, fflate, fflate. 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-6aa61b9159ad8e09ebbe5b4ae0c823fe"],"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":"2026-09-03T14:58:15.000Z","value":"7.5 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6aa61b9159ad8e09ebbe5b4ae0c823fe"}],"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-6aa61b9159ad8e09ebbe5b4ae0c823fe","url":"https://github.com/advisories/GHSA-px8p-9vwx-vf98","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-px8p-9vwx-vf98","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:29.477Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6aa61b9159ad8e09ebbe5b4ae0c823fe"],"technology":"fflate","known_exclusions":[],"conditions_summary":"fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.","public_affected_ranges":[">= 0.4.5, < 0.4.9"]},{"certainty":"source_listed","source_ids":["sr-6aa61b9159ad8e09ebbe5b4ae0c823fe"],"technology":"fflate","known_exclusions":[],"conditions_summary":"fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.","public_affected_ranges":[">= 0.5.0, < 0.5.4"]},{"certainty":"source_listed","source_ids":["sr-6aa61b9159ad8e09ebbe5b4ae0c823fe"],"technology":"fflate","known_exclusions":[],"conditions_summary":"fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.","public_affected_ranges":[">= 0.6.0, < 0.6.11"]},{"certainty":"source_listed","source_ids":["sr-6aa61b9159ad8e09ebbe5b4ae0c823fe"],"technology":"fflate","known_exclusions":[],"conditions_summary":"fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.","public_affected_ranges":[">= 0.7.0, < 0.7.5"]},{"certainty":"source_listed","source_ids":["sr-6aa61b9159ad8e09ebbe5b4ae0c823fe"],"technology":"fflate","known_exclusions":[],"conditions_summary":"fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.","public_affected_ranges":[">= 0.8.0, < 0.8.3"]}],"null_published_at":"2026-11-04T10:04:27.935Z","source_updated_at":"2026-09-03T14:58:15.000Z","source_disclosed_at":"2026-07-22T09:32:13.000Z","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":"2026-11-02T02:21:29.477Z"}],"next_cursor":null,"snapshot_revision":"42594"}