CVE-2026-59886 (High) detected in pyasn1-0.4.8-py2.py3-none-any.whl

[mend-bolt-for-github]

CVE-2026-59886 - High Severity Vulnerability

Vulnerable Library - pyasn1-0.4.8-py2.py3-none-any.whl

ASN.1 types and codecs

Library home page: https://files.pythonhosted.org/packages/62/1e/a94a8d635fa3ce4cfc7f506003548d0a2447ae76fd5ca53932970fe3053f/pyasn1-0.4.8-py2.py3-none-any.whl

Dependency Hierarchy:

• darts-0.13.1-py3-none-any.whl (Root Library)
  • tensorboard-2.8.0-py3-none-any.whl
    • google_auth-2.6.2-py2.py3-none-any.whl
      • pyasn1_modules-0.2.8-py2.py3-none-any.whl
        • ❌ pyasn1-0.4.8-py2.py3-none-any.whl (Vulnerable Library)

Found in base branch: main

Vulnerability Details

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.

Publish Date: 2026-07-14

URL: CVE-2026-59886

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-hm4w-wwcw-mr6r

Release Date: 2026-07-14

Fix Resolution (pyasn1): 0.6.4

Direct dependency fix Resolution (darts): 0.14.0

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