{"items":[{"id":"NVI-00014065","kind":"vulnerability","title":"Nokogiri does not check the return value from xmlC14NExecute","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-wx95-c6cv-8532","CVE-2026-79772"],"plain_summary":"GitHub lists this reviewed advisory for nokogiri. 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-1ade02439d5c24414356ca2c92bac975"],"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":"2026-09-02T14:42:34.000Z","value":"5.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3c8c2f6d499e406e416b965d93613bac"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.342%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.27821. Missing scores are unknown.","source_id":"sr-1ade02439d5c24414356ca2c92bac975"}],"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-3c8c2f6d499e406e416b965d93613bac","url":"https://github.com/advisories/GHSA-wx95-c6cv-8532","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-wx95-c6cv-8532","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:43.711Z"},{"id":"sr-1ade02439d5c24414356ca2c92bac975","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-2026-79772","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.069Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3c8c2f6d499e406e416b965d93613bac"],"technology":"nokogiri","known_exclusions":[],"conditions_summary":"## Summary\n\nNokogiri's CRuby extension fails to check the return value from `xmlC14NExecute` in the method `Nokogiri::XML::Document#canonicalize` and `Nokogiri::XML::Node#canonicalize`. When canonicalization fails, an empty string is returned instead of raising an exception. This incorrect return value may allow downstream libraries to accept invalid or incomplete canonicalized XML, which has been demonstrated to enable signature validation bypass in SAML libraries.\n\nJRuby is not affected, as the Java implementation correctly raises `RuntimeError` on canonicalization failure.\n\n## Mitigation\n\nUpgrade to Nokogiri `>= 1.19.1`.\n\n## Severity\n\nThe maintainers have assessed this as **Medium** severity. Nokogiri itself is a parsing library without a clear security boundary related to canonicalization, so the direct impact is that a method returns incorrect data on invalid input. However, this behavior was exploited in practice to bypass SAML signature validation in downstream libraries (see References).\n\n## Credit\n\nThis vulnerability was responsibly reported by HackerOne researcher `d4d`.","public_affected_ranges":[">= 1.5.1, < 1.19.1"]}],"null_published_at":"2026-11-08T19:53:44.008Z","source_updated_at":"2026-09-02T14:42:34.000Z","source_disclosed_at":"2026-02-18T21:57:38.000Z","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":"2026-11-02T02:21:43.711Z"},{"id":"NVI-00014065","kind":"vulnerability","title":"Nokogiri does not check the return value from xmlC14NExecute","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-wx95-c6cv-8532","CVE-2026-79772"],"plain_summary":"GitHub lists this reviewed advisory for nokogiri. 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-3c8c2f6d499e406e416b965d93613bac"],"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":"2026-09-02T14:42:34.000Z","value":"5.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3c8c2f6d499e406e416b965d93613bac"}],"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-3c8c2f6d499e406e416b965d93613bac","url":"https://github.com/advisories/GHSA-wx95-c6cv-8532","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-wx95-c6cv-8532","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:43.711Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3c8c2f6d499e406e416b965d93613bac"],"technology":"nokogiri","known_exclusions":[],"conditions_summary":"## Summary\n\nNokogiri's CRuby extension fails to check the return value from `xmlC14NExecute` in the method `Nokogiri::XML::Document#canonicalize` and `Nokogiri::XML::Node#canonicalize`. When canonicalization fails, an empty string is returned instead of raising an exception. This incorrect return value may allow downstream libraries to accept invalid or incomplete canonicalized XML, which has been demonstrated to enable signature validation bypass in SAML libraries.\n\nJRuby is not affected, as the Java implementation correctly raises `RuntimeError` on canonicalization failure.\n\n## Mitigation\n\nUpgrade to Nokogiri `>= 1.19.1`.\n\n## Severity\n\nThe maintainers have assessed this as **Medium** severity. Nokogiri itself is a parsing library without a clear security boundary related to canonicalization, so the direct impact is that a method returns incorrect data on invalid input. However, this behavior was exploited in practice to bypass SAML signature validation in downstream libraries (see References).\n\n## Credit\n\nThis vulnerability was responsibly reported by HackerOne researcher `d4d`.","public_affected_ranges":[">= 1.5.1, < 1.19.1"]}],"null_published_at":"2026-11-02T10:00:37.202Z","source_updated_at":"2026-09-02T14:42:34.000Z","source_disclosed_at":"2026-02-18T21:57:38.000Z","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":"2026-11-02T02:21:43.711Z"}],"next_cursor":null,"snapshot_revision":"42594"}