Uncontrolled Recursion Affecting pyasn1 package, versions [,0.6.3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-PYASN1-15674561
- published17 Mar 2026
- disclosed17 Mar 2026
- creditKevin Tu
Introduced: 17 Mar 2026
CVE-2026-30922 (opens in a new tab)How to fix?
Upgrade pyasn1 to version 0.6.3 or higher.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion when decoding ASN.1 data. An attacker can cause the application to crash or exhaust system memory by supplying specially crafted ASN.1 data with deeply nested SEQUENCE or SET tags using indefinite Length markers.