Is there a public exploit for CVE-2026-23490?

No public exploit for CVE-2026-23490 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-2026-23490?

CVE-2026-23490 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.76%.

What does CVE-2026-23490 affect?

CVE-2026-23490 affects pyasn1 pyasn1.

7.5 High

pyasn1 is a generic ASN.1 library for Python.

CVE-2026-23490

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.76% 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: 16 January 2026
Last updated: 17 September 2026
Affected: pyasn1 · pyasn1
Weakness: CWE-770
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

References

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