{"schema_version":"1.9.0","id":"CVE-2026-23490","published":"2026-01-16T19:03:36.442Z","modified":"2026-09-10T03:30:29.362159456Z","aliases":["GHSA-63vm-454h-vhhq","PYSEC-2026-1810"],"related":["ALSA-2026:1903","ALSA-2026:1904","ALSA-2026:1905","ALSA-2026:1906","ALSA-2026:3354","ALSA-2026:3359","ALSA-2026:4146","SUSE-SU-2026:0252-1","SUSE-SU-2026:0300-1","SUSE-SU-2026:0430-1","SUSE-SU-2026:20133-1","SUSE-SU-2026:20158-1","SUSE-SU-2026:20447-1","SUSE-SU-2026:20482-1","openSUSE-SU-2026:10078-1","openSUSE-SU-2026:20089-1"],"summary":"pyasn1 has a DoS vulnerability in decoder","details":"pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pyasn1/pyasn1","events":[{"introduced":"0"},{"fixed":"e7356f89cf32c130d65b1a0e903fe7ecce426424"},{"fixed":"3908f144229eed4df24bd569d16e5991ace44970"}],"database_specific":{"cpe":"cpe:2.3:a:pyasn1:pyasn1:*:*:*:*:*:python:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.6.2"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v0.6.1","v0.6.0","v0.5.1","v0.5.0","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","0.2.3","v0.2.2","v0.2.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23490.json"}}],"references":[{"type":"WEB","url":"https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23490.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13508"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13512"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13545"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13553"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:14020"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:17446"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:17595"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:17611"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:1903"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:1904"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:1905"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:1906"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19712"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2221"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2299"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2300"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2302"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2303"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2309"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24476"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24483"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2453"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2460"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2483"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2486"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24866"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24977"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2712"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:2758"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:28042"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30088"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3354"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3359"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37275"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3958"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3959"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:39894"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4138"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4139"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4140"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4141"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4142"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4143"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4144"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4145"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4146"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4147"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4148"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41928"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42644"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:4943"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54757"},{"type":"ADVISORY","url":"ht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