CVE-2026-23490

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

16/01/2026

Last modified:

16/01/2026

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq