CVE-2026-119197

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{"bugzilla": {"description": "pyasn1: pyasn1: Denial of Service via quadratic complexity in binary REAL decoding", "id": "2564170", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2564170"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-606", "details": ["pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, binary REAL decoding builds a large mantissa one octet at a time by shifting a growing integer and slicing the remaining byte string. Attacker-controlled ASN.1 includes a binary-encoded REAL with a large mantissa and reaches BER, CER, or DER decode(), with or without a schema containing REAL. RealPayloadDecoder.valueDecoder repeatedly performs a left shift, OR, and suffix copy for every mantissa octet, making decode time quadratic in mantissa length. A comparatively small REAL value can hold a decoding worker on one CPU core for seconds or longer and cause availability loss. This issue is fixed in version 0.6.5.", "A flaw was found in pyasn1. A remote attacker can exploit this vulnerability by submitting specially crafted Abstract Syntax Notation One (ASN.1) data containing a binary-encoded floating-point (REAL) value with a large mantissa. Processing this input leads to quadratic decoding time and excessive CPU consumption, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-119197", "package_state": [{"cpe": "cpe:/a:redhat:ansible_automation_orchestrator:2026.8", "fix_state": "Affected", "package_name": "ansible-automation-platform/automation-orchestrator-backend-rhel9", "product_name": "Ansible Automation Orchestrator 2026"}, {"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Affected", "package_name": "exploit-intelligence/vulnerability-analysis-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:workload_availability_far:0", "fix_state": "Affected", "package_name": "workload-availability/fence-agents-remediation-rhel9-operator", "product_name": "Fence Agents Remediation Operator"}, {"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Affected", "package_name": "lightspeed-core/lightspeed-stack-rhel9", "product_name": "Lightspeed Core"}, {"cpe": 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"product_name": "Red Hat OpenShift Container Platform 5"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Affected", "package_name": "python-pyasn1", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Affected", "package_name": "python-pyasn1", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite/iop-advisor-backend-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/model-transparency-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/rh-sigstore-a2a-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:stf:1.5", "fix_state": "Affected", "package_name": "stf/prometheus-webhook-snmp-rhel9", "product_name": "Service Telemetry Framework 1.5"}, {"cpe": "cpe:/a:redhat:stf:1.5", "fix_state": "Affected", "package_name": "stf/service-telemetry-rhel9-operator", "product_name": "Service Telemetry Framework 1.5"}, {"cpe": "cpe:/a:redhat:stf:1.5", "fix_state": "Affected", "package_name": "stf/smart-gateway-rhel9-operator", "product_name": "Service Telemetry Framework 1.5"}], "public_date": "2026-10-29T19:48:52Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-119197\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-119197\nhttps://github.com/pyasn1/pyasn1/commit/ce3ec3390784780a530047e0e77be5ff457636a4\nhttps://github.com/pyasn1/pyasn1/pull/132\nhttps://github.com/pyasn1/pyasn1/releases/tag/v0.6.5\nhttps://github.com/pyasn1/pyasn1/security/advisories/GHSA-mm57-4v3p-rchx"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.6.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "pyasn1", "source": "cna", "vendor": "pyasn1"}, "product": "pyasn1", "vendor": "pyasn1"}], "created": "2026-10-29T21:45:14.459221+00:00", "updated": "2026-10-31T02:00:12.473816+00:00", "vendors": ["pyasn1", "pyasn1$PRODUCT$pyasn1"]}