CVE-2026-59884
7.5 · HIGHOverview
CVE-2026-59884 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 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.
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-2026-59884?
CVE-2026-59884 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-2026-59884?
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-2026-59884?
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-2026-59884?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-59884 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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