CVE-2026-59884

תיאור (מקור, אנגלית)

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.

מדדים

CVSS 3.1

7.5 (HIGH) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-9/8/2026

CWE

CWE-400

מוצרים מושפעים

pyasn1: pyasn1

קישורים

• https://github.com/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5 Patch
• https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4 Release Notes
• https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j Third Party Advisory