{"id":"CVE-2026-23490","aliases":["GHSA-63vm-454h-vhhq","PYSEC-2026-1810"],"url":"https://o3.security/vulnerability/CVE-2026-23490","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.","published":"2026-01-16T19:03:36.442Z","modified":"2026-08-07T03:30:31.474042031Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pyasn1","fixedVersion":"0.6.2"}],"fix":{"url":"https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970","label":"pyasn1/pyasn1@3908f14"},"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-2026:5606"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-23490"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23490.json"},{"type":"ADVISORY","url":"https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23490"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2430472"},{"type":"FIX","url":"https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970"}],"provenance":{"sources":["OSV.dev","FIRST.org 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