{"items":[{"id":"NVI-00016028","kind":"vulnerability","title":"jsrsasign: Negative Exponent Handling Leads to Signature Verification Bypass","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-8qwj-4jxw-m8jw","CVE-2026-4602"],"plain_summary":"GitHub lists this reviewed advisory for jsrsasign. 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-08451a9c8da85034df18258a1d977267"],"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":"2026-07-21T13:42:25.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-08451a9c8da85034df18258a1d977267"}],"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-08451a9c8da85034df18258a1d977267","url":"https://github.com/advisories/GHSA-8qwj-4jxw-m8jw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-8qwj-4jxw-m8jw","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:34:49.300Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-08451a9c8da85034df18258a1d977267"],"technology":"jsrsasign","known_exclusions":[],"conditions_summary":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types due to handling negative exponents in ext/jsbn2.js. An attacker can force the computation of incorrect modular inverses and break signature verification by calling modPow with a negative exponent.","public_affected_ranges":["< 11.1.1"]}],"null_published_at":"2026-11-04T10:04:27.867Z","source_updated_at":"2026-07-21T13:42:25.000Z","source_disclosed_at":"2026-03-23T06:30:29.000Z","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":"2026-11-03T22:34:49.300Z"}],"next_cursor":null,"snapshot_revision":"42594"}