CVE-2026-23490

7.5 HIGH
Published: January 16, 2026 Modified: March 13, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
Source: security-advisories@github.com
Product Release Notes
https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
Source: security-advisories@github.com
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
5th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

pyasn1 debian