PT-2026-58107 · Pyasn1 · Pyasn1

Publicado 2026-07-14 · Atualizado 2026-07-14 · CVE-2026-59886

Mitre

CVSS v3.1

7.5

Alta

Vetor base

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float conversion through prettyPrint(), str(), comparison, arithmetic, int(), or an explicit float() call to consume excessive CPU and memory and hang applications that decode untrusted ASN.1 data and then print, log, or compare decoded objects. This issue is fixed in version 0.6.4.

Correção

Resource Exhaustion

Allocation of Resources Without Limits

Enumeração de Fraquezas

CWE-400

CWE-770

Identificadores relacionados

CVE-2026-59886

Produtos afetados

Pyasn1

Referências · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-59886 · Nota de Segurança
• https://github.com/pyasn1/pyasn1/security/advisories/GHSA-hm4w-wwcw-mr6r · Nota
• https://github.com/pyasn1/pyasn1/commit/e60c691cb91addb8fcefa2f537e85ede6fb1e886 · Nota
• https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4 · Nota