{"id":"CVE-2026-84008","title":"Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.","summary":"Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-407","CWE-1333"],"vendor":"System","product":"System.Security.Cryptography.Pkcs","affected":["System.Security.Cryptography.Pkcs >= 10.0.0, <= 10.0.12","System.Security.Cryptography.Pkcs >= 11.0.0-preview.1, <= 11.0.0-rc.1","System.Security.Cryptography.Pkcs >= 8.0.0, <= 8.0.1","System.Security.Cryptography.Pkcs >= 9.0.0, <= 9.0.20"],"patched":["System.Security.Cryptography.Pkcs 10.0.13","System.Security.Cryptography.Pkcs 11.0.0-rc.2","System.Security.Cryptography.Pkcs 8.0.2","System.Security.Cryptography.Pkcs 9.0.21"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T23:18:40.710","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84008","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84008","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/runtime/security/advisories/GHSA-846f-f764-76mx"},{"url":"https://github.com/dotnet/announcements/issues/468"},{"url":"https://github.com/dotnet/runtime/issues/135703"},{"url":"https://github.com/advisories/GHSA-846f-f764-76mx"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84008"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84008.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-84008"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2550849"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84008"},{"url":"https://access.redhat.com/errata/RHSA-2026:84693"}],"tags":["nvd","ghsa","nuget","cve.org","csaf","vex","red-hat"],"aliases":["GHSA-846f-f764-76mx"],"ecosystem":"nuget","ingestedAt":"2026-10-13T19:43:29.146Z","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-13T22:07:10.813689Z"},"epss":0.00991,"epssPercentile":0.62356,"slug":"CVE-2026-84008","body":"## Overview\n\nInefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-84008)\n\nAffected packages:\n\n- `System.Security.Cryptography.Pkcs >= 10.0.0, <= 10.0.12`\n- `System.Security.Cryptography.Pkcs >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `System.Security.Cryptography.Pkcs >= 8.0.0, <= 8.0.1`\n- `System.Security.Cryptography.Pkcs >= 9.0.0, <= 9.0.20`\n\nPatched in:\n\n- `System.Security.Cryptography.Pkcs 10.0.13`\n- `System.Security.Cryptography.Pkcs 11.0.0-rc.2`\n- `System.Security.Cryptography.Pkcs 8.0.2`\n- `System.Security.Cryptography.Pkcs 9.0.21`\n\nSource: https://github.com/advisories/GHSA-846f-f764-76mx\n\n## Vendor advisories\n\n- **RHSA-2026:84693** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84693)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84008.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}