CVE-2026-59886
7.5 · HIGHOverview
CVE-2026-59886 is a high-severity vulnerability affecting pyasn1 pyasn1. It was published on July 14, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from pyasn1. Update pyasn1 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| pyasn1 | pyasn1 | >= 0, < 0.6.4 | Affected |
Frequently Asked Questions
What is CVE-2026-59886?
CVE-2026-59886 is a high-severity vulnerability affecting pyasn1 pyasn1. It was published on July 14, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-59886?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-59886?
Check the references section for vendor advisories and patches from pyasn1. Update pyasn1 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-59886?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-59886 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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