{"action":"Upgrade pyasn1 to 0.6.4 or later.","affected":[{"fixed":"0.6.4","introduced":"0"}],"component":"pyasn1","cve_ids":["CVE-2026-59884"],"ecosystem":"PyPI","epss":0.00616,"exploited":false,"fixed_versions":["0.6.4"],"ghsa_id":"GHSA-m4p7-r5rc-7g4j","id":"tcs_01M5KFQ8533A9CCPEFXD1K3YA3","modified_at":"2026-09-10T03:50:52.562707948Z","published_at":"2026-07-21T19:10:11Z","references":["https://osv.dev/vulnerability/GHSA-m4p7-r5rc-7g4j","https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j","https://nvd.nist.gov/vuln/detail/CVE-2026-59884","https://github.com/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5","https://github.com/pyasn1/pyasn1","https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4","https://github.com/pypa/advisory-database/tree/main/vulns/pyasn1/PYSEC-2026-3455.yaml"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-m4p7-r5rc-7g4j","url":"https://osv.dev/vulnerability/GHSA-m4p7-r5rc-7g4j"}],"summary":"pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs"}