{"items":[{"id":"NVI-00009043","kind":"vulnerability","title":"pyasn1 has quadratic-complexity denial of service in binary REAL decoding","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-mm57-4v3p-rchx","CVE-2026-119197"],"plain_summary":"GitHub lists this reviewed advisory for pyasn1. 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-0c7dfaf67860ef4a7fb1e88a0210bf2e"],"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":"2026-10-30T23:06:48.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-88e10b4a5a51ba0d464515af0c71f4cc"},{"kind":"CVSS","as_of":"2026-10-30T17:18:03.880Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1387fe171636ee5027dcdad7a3afc2e5"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.425%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.36945. Missing scores are unknown.","source_id":"sr-0c7dfaf67860ef4a7fb1e88a0210bf2e"}],"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-88e10b4a5a51ba0d464515af0c71f4cc","url":"https://github.com/advisories/GHSA-mm57-4v3p-rchx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mm57-4v3p-rchx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-1387fe171636ee5027dcdad7a3afc2e5","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119197","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-119197","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:16.598Z"},{"id":"sr-0c7dfaf67860ef4a7fb1e88a0210bf2e","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-2026-119197","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:58:50.317Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-88e10b4a5a51ba0d464515af0c71f4cc"],"technology":"pyasn1","known_exclusions":[],"conditions_summary":"## Summary\n\nIn pyasn1 0.6.4 and earlier, decoding a binary-encoded ASN.1 REAL with a large mantissa can consume CPU time quadratic in the mantissa length. The BER, CER, and DER decoders all use the affected `RealPayloadDecoder`. An application is exposed when it passes attacker-controlled ASN.1 containing a REAL value to one of these decoders, either without an `asn1Spec` or with a schema that includes REAL. The work occurs inside `decode()`; the application does not need to convert, print, or otherwise use the resulting REAL object.\n\nThis is distinct from CVE-2026-59886, which concerns converting an already-decoded REAL to a Python float. That issue was fixed in 0.6.4 and its advisory states that decoding alone does not trigger it.\n\n## Root cause and affected components\n\nFor binary REAL values, `RealPayloadDecoder.valueDecoder` in v0.6.4 builds the mantissa one octet at a time:\n\n```python\np = 0\nwhile chunk:\n    p <<= 8\n    p |= chunk[0]\n    chunk = chunk[1:]\n```\n\nEach shift processes an integer that grows with the mantissa; with byte strings, e","public_affected_ranges":["<= 0.6.4"]}],"null_published_at":"2026-11-07T14:01:58.755Z","source_updated_at":"2026-10-30T23:06:48.000Z","source_disclosed_at":"2026-10-30T23:06:46.000Z","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":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00009043","kind":"vulnerability","title":"pyasn1 has quadratic-complexity denial of service in binary REAL decoding","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-mm57-4v3p-rchx","CVE-2026-119197"],"plain_summary":"GitHub lists this reviewed advisory for pyasn1. 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-1387fe171636ee5027dcdad7a3afc2e5"],"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":"2026-10-30T23:06:48.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-88e10b4a5a51ba0d464515af0c71f4cc"},{"kind":"CVSS","as_of":"2026-10-30T17:18:03.880Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1387fe171636ee5027dcdad7a3afc2e5"}],"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-88e10b4a5a51ba0d464515af0c71f4cc","url":"https://github.com/advisories/GHSA-mm57-4v3p-rchx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mm57-4v3p-rchx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-1387fe171636ee5027dcdad7a3afc2e5","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119197","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-119197","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:16.598Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-88e10b4a5a51ba0d464515af0c71f4cc"],"technology":"pyasn1","known_exclusions":[],"conditions_summary":"## Summary\n\nIn pyasn1 0.6.4 and earlier, decoding a binary-encoded ASN.1 REAL with a large mantissa can consume CPU time quadratic in the mantissa length. The BER, CER, and DER decoders all use the affected `RealPayloadDecoder`. An application is exposed when it passes attacker-controlled ASN.1 containing a REAL value to one of these decoders, either without an `asn1Spec` or with a schema that includes REAL. The work occurs inside `decode()`; the application does not need to convert, print, or otherwise use the resulting REAL object.\n\nThis is distinct from CVE-2026-59886, which concerns converting an already-decoded REAL to a Python float. That issue was fixed in 0.6.4 and its advisory states that decoding alone does not trigger it.\n\n## Root cause and affected components\n\nFor binary REAL values, `RealPayloadDecoder.valueDecoder` in v0.6.4 builds the mantissa one octet at a time:\n\n```python\np = 0\nwhile chunk:\n    p <<= 8\n    p |= chunk[0]\n    chunk = chunk[1:]\n```\n\nEach shift processes an integer that grows with the mantissa; with byte strings, e","public_affected_ranges":["<= 0.6.4"]}],"null_published_at":"2026-11-03T10:03:31.372Z","source_updated_at":"2026-10-30T23:06:48.000Z","source_disclosed_at":"2026-10-30T23:06:46.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00009043","kind":"vulnerability","title":"pyasn1 has quadratic-complexity denial of service in binary REAL decoding","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-mm57-4v3p-rchx","CVE-2026-119197"],"plain_summary":"GitHub lists this reviewed advisory for pyasn1. 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-88e10b4a5a51ba0d464515af0c71f4cc"],"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":"2026-10-30T23:06:48.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-88e10b4a5a51ba0d464515af0c71f4cc"}],"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-88e10b4a5a51ba0d464515af0c71f4cc","url":"https://github.com/advisories/GHSA-mm57-4v3p-rchx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mm57-4v3p-rchx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-88e10b4a5a51ba0d464515af0c71f4cc"],"technology":"pyasn1","known_exclusions":[],"conditions_summary":"## Summary\n\nIn pyasn1 0.6.4 and earlier, decoding a binary-encoded ASN.1 REAL with a large mantissa can consume CPU time quadratic in the mantissa length. The BER, CER, and DER decoders all use the affected `RealPayloadDecoder`. An application is exposed when it passes attacker-controlled ASN.1 containing a REAL value to one of these decoders, either without an `asn1Spec` or with a schema that includes REAL. The work occurs inside `decode()`; the application does not need to convert, print, or otherwise use the resulting REAL object.\n\nThis is distinct from CVE-2026-59886, which concerns converting an already-decoded REAL to a Python float. That issue was fixed in 0.6.4 and its advisory states that decoding alone does not trigger it.\n\n## Root cause and affected components\n\nFor binary REAL values, `RealPayloadDecoder.valueDecoder` in v0.6.4 builds the mantissa one octet at a time:\n\n```python\np = 0\nwhile chunk:\n    p <<= 8\n    p |= chunk[0]\n    chunk = chunk[1:]\n```\n\nEach shift processes an integer that grows with the mantissa; with byte strings, e","public_affected_ranges":["<= 0.6.4"]}],"null_published_at":"2026-10-31T22:13:31.268Z","source_updated_at":"2026-10-30T23:06:48.000Z","source_disclosed_at":"2026-10-30T23:06:46.000Z","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":"2026-10-31T21:55:49.621Z"}],"next_cursor":null,"snapshot_revision":"42594"}