pyasn1 has a DoS vulnerability in decoder
Summary
| CVE | CVE-2026-23490 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-01-16 19:16:19 UTC |
| Updated | 2026-06-30 03:17:31 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.006790000 probability, percentile 0.477910000 (date 2026-07-01)
Problem Types: CWE-770 | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling | CWE-770 Allocation of Resources Without Limits or Throttling
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Debian | Debian Linux | 11.0 | All | All | All |
| Application | Pyasn1 | Pyasn1 | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:4144 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4146 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4140 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4142 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4148 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13512 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:3958 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:28042 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2299 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:5606 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13553 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2453 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4943 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24977 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2758 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23490.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24476 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13508 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4139 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2303 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2309 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:3354 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2486 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| lists.debian.org/debian-lts-announce/2026/02/msg00002.html | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Vendor Advisory |
| github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970 | [email protected] | github.com | Patch |
| access.redhat.com/errata/RHSA-2026:1904 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:1906 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24483 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2483 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| github.com/pyasn1/pyasn1/releases/tag/v0.6.2 | [email protected] | github.com | Product, Release Notes |
| access.redhat.com/errata/RHSA-2026:2712 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:3359 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:1903 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:1905 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-23490 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:30088 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2302 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2300 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:17446 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2221 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4138 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:17611 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:2460 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24866 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq | [email protected] | github.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:17595 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13545 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:19712 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:14020 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4143 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4141 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4147 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4145 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:3959 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-01-16T20:03:33.790Z | Reported to Red Hat. |
| ADP | 2026-01-16T19:03:36.442Z | Made public. |
Solutions
ADP: RHSA-2026:4148: Red Hat Enterprise Linux Server (v. 7 ELS)
ADP: RHSA-2026:2758: Red Hat Enterprise Linux Server HighAvailability (v. 7 ELS), Red Hat Enterprise Linux Server ResilientStorage (v. 7 ELS), Red Hat Enterprise Linux Server for SAP ELS (v. 7), Red Hat Enterprise Linux Server for SAPHANA ELS (v. 7)
ADP: RHSA-2026:3959: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9
ADP: RHSA-2026:13512: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9
ADP: RHSA-2026:28042: Red Hat OpenStack Platform 17.1
ADP: RHSA-2026:3958: Red Hat Ansible Automation Platform 2.6 for RHEL 9
ADP: RHSA-2026:13508: Red Hat Ansible Automation Platform 2.6 for RHEL 9
ADP: RHSA-2026:17595: Ironic content for Red Hat OpenShift Container Platform 4.17
ADP: RHSA-2026:17446: Ironic content for Red Hat OpenShift Container Platform 4.18
ADP: RHSA-2026:2309: Red Hat Enterprise Linux AppStream EUS (v. 10.0)
ADP: RHSA-2026:4138: Red Hat Enterprise Linux AppStream EUS (v. 10.0)
ADP: RHSA-2026:1905: Red Hat Enterprise Linux AppStream (v. 10)
ADP: RHSA-2026:3354: Red Hat Enterprise Linux AppStream (v. 10)
ADP: RHSA-2026:1906: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux HighAvailability (v. 8), Red Hat Enterprise Linux ResilientStorage (v. 8)
ADP: RHSA-2026:4146: Red Hat Enterprise Linux AppStream (v. 8)
ADP: RHSA-2026:4145: Red Hat Enterprise Linux AppStream AUS (v. 8.2)
ADP: RHSA-2026:2483: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux High Availability AUS (v.8.4), Red Hat Enterprise Linux HighAvailability EUS EXTENSION (v.8.4)
ADP: RHSA-2026:4147: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
ADP: RHSA-2026:2486: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6), Red Hat Enterprise Linux High Availability E4S (v.8.6), Red Hat Enterprise Linux High Availability TUS (v.8.6)
ADP: RHSA-2026:4144: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)
ADP: RHSA-2026:2221: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8), Red Hat Enterprise Linux High Availability E4S (v.8.8), Red Hat Enterprise Linux High Availability TUS (v.8.8)
ADP: RHSA-2026:4139: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)
ADP: RHSA-2026:2303: Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux High Availability E4S (v.9.0), Red Hat Enterprise Linux ResilientStorage E4S (v.9.0)
ADP: RHSA-2026:4140: Red Hat Enterprise Linux AppStream E4S (v.9.0)
ADP: RHSA-2026:2300: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux High Availability E4S (v.9.2), Red Hat Enterprise Linux Resilient Storage E4S (v.9.2)
ADP: RHSA-2026:4142: Red Hat Enterprise Linux AppStream E4S (v.9.2)
ADP: RHSA-2026:2302: Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux High Availability EUS (v.9.4), Red Hat Enterprise Linux Resilient Storage EUS (v.9.4)
ADP: RHSA-2026:4143: Red Hat Enterprise Linux AppStream EUS (v.9.4)
ADP: RHSA-2026:2299: Red Hat Enterprise Linux AppStream EUS (v.9.6)
ADP: RHSA-2026:4141: Red Hat Enterprise Linux AppStream EUS (v.9.6)
ADP: RHSA-2026:1903: Red Hat Enterprise Linux AppStream (v. 9)
ADP: RHSA-2026:3359: Red Hat Enterprise Linux AppStream (v. 9)
ADP: RHSA-2026:1904: Red Hat Enterprise Linux HighAvailability (v. 8), Red Hat Enterprise Linux ResilientStorage (v. 8)
ADP: RHSA-2026:2712: Red Hat Enterprise Linux High Availability AUS (v.8.4), Red Hat Enterprise Linux HighAvailability EUS EXTENSION (v.8.4)
ADP: RHSA-2026:2453: Red Hat Enterprise Linux High Availability E4S (v.8.6), Red Hat Enterprise Linux High Availability TUS (v.8.6)
ADP: RHSA-2026:2460: Red Hat Enterprise Linux High Availability E4S (v.8.8), Red Hat Enterprise Linux High Availability TUS (v.8.8)
ADP: RHSA-2026:30088: Red Hat AI Inference Server 3.3
ADP: RHSA-2026:13553: Red Hat Ansible Automation Platform 2.5
ADP: RHSA-2026:13545: Red Hat Ansible Automation Platform 2.6
ADP: RHSA-2026:24866: Red Hat Ansible Automation Platform 2.6
ADP: RHSA-2026:5606: Red Hat Ceph Storage 8
ADP: RHSA-2026:17611: Red Hat Enterprise Linux AI 3.3
ADP: RHSA-2026:24977: Red Hat OpenShift AI 2.25
ADP: RHSA-2026:19712: Red Hat OpenShift AI 3.3
ADP: RHSA-2026:14020: Red Hat OpenStack 1.5
ADP: RHSA-2026:24476: Red Hat Trusted Artifact Signer 1.3
ADP: RHSA-2026:24483: Red Hat Trusted Artifact Signer 1.4
ADP: RHSA-2026:4943: Red Hat Update Infrastructure 5