{"items":[{"id":"NVI-00016036","kind":"vulnerability","title":"pyasn1: Quadratic complexity in OBJECT IDENTIFIER and RELATIVE-OID processing allows denial of service","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-8ppf-4f7h-5ppj","CVE-2026-59885"],"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-54d3fee505ca6031ddf6edcb94987b11"],"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":"2026-07-21T19:11:04.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0b81065c754f36a3685d644343551878"},{"kind":"CVSS","as_of":"2026-07-21T14:38:21.580Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-54d3fee505ca6031ddf6edcb94987b11"}],"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-0b81065c754f36a3685d644343551878","url":"https://github.com/advisories/GHSA-8ppf-4f7h-5ppj","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-8ppf-4f7h-5ppj","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:34:39.734Z"},{"id":"sr-54d3fee505ca6031ddf6edcb94987b11","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59885","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-59885","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T08:05:01.676Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0b81065c754f36a3685d644343551878"],"technology":"pyasn1","known_exclusions":[],"conditions_summary":"### Impact\nThe BER/CER/DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs. A small crafted payload (tens of kilobytes) containing an OID with many arcs consumes seconds of CPU per decode() call, allowing denial of service in any application that decodes untrusted ASN.1 data (certificates, LDAP, SNMP, Kerberos, etc.). The corresponding encoders have the same quadratic behavior, reachable when an application re-encodes previously decoded attacker-supplied values.\n\nThe arc-size limit introduced for CVE-2026-23490 bounds the byte length of an individual arc but not the number of arcs, so it does not mitigate this issue.\n\n### Affected components\nObjectIdentifierPayloadDecoder and RelativeOIDPayloadDecoder in pyasn1/codec/ber/decoder.py; ObjectIdentifierEncoder and RelativeOIDEncoder in pyasn1/codec/ber/encoder.py. The CER and DER codecs inherit these and are equally affected.\n\n### Patches\nFixed in pyasn1 0.6.4: arc accumulation in both decoders and encoders now runs in linear time.\n\n### Workarounds\nLimit the size of untrusted ASN.1 input before decoding.","public_affected_ranges":["<= 0.6.3"]}],"null_published_at":"2026-11-08T19:53:44.057Z","source_updated_at":"2026-07-21T19:11:04.000Z","source_disclosed_at":"2026-07-21T19:11:03.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T22:34:39.734Z"},{"id":"NVI-00016036","kind":"vulnerability","title":"pyasn1: Quadratic complexity in OBJECT IDENTIFIER and RELATIVE-OID processing allows denial of service","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-8ppf-4f7h-5ppj","CVE-2026-59885"],"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-0b81065c754f36a3685d644343551878"],"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":"2026-07-21T19:11:04.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0b81065c754f36a3685d644343551878"}],"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-0b81065c754f36a3685d644343551878","url":"https://github.com/advisories/GHSA-8ppf-4f7h-5ppj","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-8ppf-4f7h-5ppj","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:34:39.734Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0b81065c754f36a3685d644343551878"],"technology":"pyasn1","known_exclusions":[],"conditions_summary":"### Impact\nThe BER/CER/DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs. A small crafted payload (tens of kilobytes) containing an OID with many arcs consumes seconds of CPU per decode() call, allowing denial of service in any application that decodes untrusted ASN.1 data (certificates, LDAP, SNMP, Kerberos, etc.). The corresponding encoders have the same quadratic behavior, reachable when an application re-encodes previously decoded attacker-supplied values.\n\nThe arc-size limit introduced for CVE-2026-23490 bounds the byte length of an individual arc but not the number of arcs, so it does not mitigate this issue.\n\n### Affected components\nObjectIdentifierPayloadDecoder and RelativeOIDPayloadDecoder in pyasn1/codec/ber/decoder.py; ObjectIdentifierEncoder and RelativeOIDEncoder in pyasn1/codec/ber/encoder.py. The CER and DER codecs inherit these and are equally affected.\n\n### Patches\nFixed in pyasn1 0.6.4: arc accumulation in both decoders and encoders now runs in linear time.\n\n### Workarounds\nLimit the size of untrusted ASN.1 input before decoding.","public_affected_ranges":["<= 0.6.3"]}],"null_published_at":"2026-11-04T10:04:27.868Z","source_updated_at":"2026-07-21T19:11:04.000Z","source_disclosed_at":"2026-07-21T19:11:03.000Z","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":"2026-11-03T22:34:39.734Z"}],"next_cursor":null,"snapshot_revision":"42594"}