Is there a public exploit for CVE-2026-30922?

No public exploit for CVE-2026-30922 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-30922?

CVE-2026-30922 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.84%.

What does CVE-2026-30922 affect?

CVE-2026-30922 affects pyasn1 pyasn1.

7.5 High

pyasn1 is a generic ASN.1 library for Python.

CVE-2026-30922

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENCE (0x30) or SET (0x31) tags with "Indefinite Length" (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (MAXOIDARCCONTINUATIONOCTETS) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.84% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 18 March 2026
Last updated: 17 September 2026
Affected: pyasn1 · pyasn1
Weakness: CWE-674, CWE-835
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

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