{"items":[{"id":"NVI-00018352","kind":"vulnerability","title":"CoreWCF: WS-Security signature substitution via document-wide Signature lookup","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jc6x-rj79-w4mx","CVE-2026-54773"],"plain_summary":"GitHub lists this reviewed advisory for CoreWCF.Primitives, CoreWCF.Primitives. 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-156a370e428b5eccfcc13970e7b5da64"],"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":"2026-06-19T20:46:44.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-156a370e428b5eccfcc13970e7b5da64"}],"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-156a370e428b5eccfcc13970e7b5da64","url":"https://github.com/advisories/GHSA-jc6x-rj79-w4mx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jc6x-rj79-w4mx","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T07:19:16.585Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-156a370e428b5eccfcc13970e7b5da64"],"technology":"CoreWCF.Primitives","known_exclusions":[],"conditions_summary":"### Impact\nAn unauthenticated remote attacker who can place a SOAP header lexically before `wsse:Security` can embed a `ds:Signature` of their choosing inside that header and cause the server to verify the attacker-supplied signature instead of the one carried in the security header.\n\n#### Preconditions\nExploitation requires the endpoint be configured with an endorsing supporting token binding, and the attacker constructs a `ds:Signature` whose `KeyInfo` resolves through the receive-side token resolver to a key under the attacker’s control. Both are conditions outside the attacker’s direct control on a generic deployment.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nUse a security token resolver that only accepts references to issuer-pinned X.509 chains (the default when expecting a static set of signing certificates).","public_affected_ranges":["< 1.8.1"]},{"certainty":"source_listed","source_ids":["sr-156a370e428b5eccfcc13970e7b5da64"],"technology":"CoreWCF.Primitives","known_exclusions":[],"conditions_summary":"### Impact\nAn unauthenticated remote attacker who can place a SOAP header lexically before `wsse:Security` can embed a `ds:Signature` of their choosing inside that header and cause the server to verify the attacker-supplied signature instead of the one carried in the security header.\n\n#### Preconditions\nExploitation requires the endpoint be configured with an endorsing supporting token binding, and the attacker constructs a `ds:Signature` whose `KeyInfo` resolves through the receive-side token resolver to a key under the attacker’s control. Both are conditions outside the attacker’s direct control on a generic deployment.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nUse a security token resolver that only accepts references to issuer-pinned X.509 chains (the default when expecting a static set of signing certificates).","public_affected_ranges":[">= 1.9.0, < 1.9.1"]}],"null_published_at":"2026-11-07T07:07:39.821Z","source_updated_at":"2026-06-19T20:46:44.000Z","source_disclosed_at":"2026-06-19T20:46:43.000Z","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":"2026-11-06T07:19:16.585Z"}],"next_cursor":null,"snapshot_revision":"42594"}