CVE-2026-23490

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.

PUBLISHED Reserved 2026-01-13 | Published 2026-01-16 | Updated 2026-02-01 | Assigner GitHub_M

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

References

lists.debian.org/debian-lts-announce/2026/02/msg00002.html

github.com/...pyasn1/security/advisories/GHSA-63vm-454h-vhhq

github.com/...ommit/3908f144229eed4df24bd569d16e5991ace44970

github.com/pyasn1/pyasn1/releases/tag/v0.6.2

cve.org (CVE-2026-23490)

nvd.nist.gov (CVE-2026-23490)

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