{"items":[{"id":"NVI-00012087","kind":"vulnerability","title":"Microsoft Security Advisory CVE-2026-84008 - .NET Denial of Service Vulnerability","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-846f-f764-76mx","CVE-2026-84008"],"plain_summary":"GitHub lists this reviewed advisory for System.Security.Cryptography.Pkcs, System.Security.Cryptography.Pkcs, System.Security.Cryptography.Pkcs, System.Security.Cryptography.Pkcs. 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-a0d8c492b1add36d42cbf7a4dd9ae3db"],"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":"2026-10-19T19:17:43.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-a33b56610fbfada41299afa600b1435b"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.991%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.62546. Missing scores are unknown.","source_id":"sr-a0d8c492b1add36d42cbf7a4dd9ae3db"}],"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-a33b56610fbfada41299afa600b1435b","url":"https://github.com/advisories/GHSA-846f-f764-76mx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-846f-f764-76mx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:14.588Z"},{"id":"sr-a0d8c492b1add36d42cbf7a4dd9ae3db","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-2026-84008","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.087Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 10.0.0, <= 10.0.12"]},{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 11.0.0-preview.1, <= 11.0.0-rc.1"]},{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 8.0.0, <= 8.0.1"]},{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 9.0.0, <= 9.0.20"]}],"null_published_at":"2026-11-07T00:57:04.318Z","source_updated_at":"2026-10-19T19:17:43.000Z","source_disclosed_at":"2026-10-13T20:03:30.000Z","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":"2026-10-31T23:14:14.588Z"},{"id":"NVI-00012087","kind":"vulnerability","title":"Microsoft Security Advisory CVE-2026-84008 - .NET Denial of Service Vulnerability","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-846f-f764-76mx","CVE-2026-84008"],"plain_summary":"GitHub lists this reviewed advisory for System.Security.Cryptography.Pkcs, System.Security.Cryptography.Pkcs, System.Security.Cryptography.Pkcs, System.Security.Cryptography.Pkcs. 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-a33b56610fbfada41299afa600b1435b"],"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":"2026-10-19T19:17:43.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-a33b56610fbfada41299afa600b1435b"}],"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-a33b56610fbfada41299afa600b1435b","url":"https://github.com/advisories/GHSA-846f-f764-76mx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-846f-f764-76mx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:14.588Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 10.0.0, <= 10.0.12"]},{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 11.0.0-preview.1, <= 11.0.0-rc.1"]},{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 8.0.0, <= 8.0.1"]},{"certainty":"source_listed","source_ids":["sr-a33b56610fbfada41299afa600b1435b"],"technology":"System.Security.Cryptography.Pkcs","known_exclusions":[],"conditions_summary":"## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Pkcs. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\n`SignedCms.CheckSignature` can repeatedly reparse attacker-controlled X.509 data, causing unauthenticated quadratic CPU exhaustion.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/468\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`\n\n- **Weakness:** CWE-407 (Inefficient Algorithmic Complexity)\n## Affected Platforms\n\n- **Platforms:** Windows, Linux, macOS\n- **Architectures:** All\n\n## Affected Packages\n\nThe vulnerability affects Microsoft .NET projects that use an affected package version listed below.\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | ---------------\nSystem.Security.Cryptography.Pkcs | >= 10.0.0, <= 10.0.12 | 10.0.13\n[Sy","public_affected_ranges":[">= 9.0.0, <= 9.0.20"]}],"null_published_at":"2026-11-01T01:03:56.629Z","source_updated_at":"2026-10-19T19:17:43.000Z","source_disclosed_at":"2026-10-13T20:03:30.000Z","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":"2026-10-31T23:14:14.588Z"}],"next_cursor":null,"snapshot_revision":"42594"}