CVE-2026-23490
HIGH severity · CVSS 7.5 · Resource exhaustion
7.5CVSS HIGH
Summary
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 & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970 ↗
Additional information
- NVD record
- https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970Patch
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhqAdvisory
- https://lists.debian.org/debian-lts-announce/2026/02/msg00002.htmlAdvisory
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
- https://access.redhat.com/errata/RHSA-2026:13508
- https://access.redhat.com/errata/RHSA-2026:13512
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:13553