CVE-2026-23490

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/16/2026

Last Modified3/13/2026

Sourcenvd

Honeypot Sightings0

Affected Products

debian:debian_linuxpyasn1:pyasn1

Weaknesses (CWE)

CWE-770

References

https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970(security-advisories@github.com)

https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2(security-advisories@github.com)

https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq(security-advisories@github.com)

https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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