CVE-2026-23490

HIGH

pyasn1 < 0.6.2 - Denial of Service via Malformed RELATIVE-OID

Title source: llm
STIX 2.1

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.

References (59)

Core 59
Core References

Scores

CVSS v3 7.5
EPSS 0.0068
EPSS Percentile 48.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (3)
debian/debian_linux 11.0
pyasn1/pyasn1 < 0.6.2 (2 CPE variants)
pypi/pyasn1 0.6.1 - 0.6.2PyPI
Published Jan 16, 2026
Tracked Since Feb 18, 2026