{"action":"Upgrade pyasn1 to 0.6.4 or later.","affected":[{"fixed":"0.6.4","introduced":"0"}],"component":"pyasn1","cve_ids":["CVE-2026-59886"],"ecosystem":"PyPI","epss":0.0044,"exploited":false,"fixed_versions":["0.6.4"],"ghsa_id":"GHSA-hm4w-wwcw-mr6r","id":"tcs_01M5KH5EA9QJ84QCH54F94A6M6","modified_at":"2026-07-22T11:00:08.839691351Z","published_at":"2026-07-14T17:17:15.010Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3457","https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4","https://github.com/pyasn1/pyasn1/security/advisories/GHSA-hm4w-wwcw-mr6r","https://github.com/pyasn1/pyasn1/commit/e60c691cb91addb8fcefa2f537e85ede6fb1e886"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-3457","url":"https://osv.dev/vulnerability/PYSEC-2026-3457"}],"summary":"pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER,"}