CVE-2026-23490
pyasn1 has a DoS vulnerability in decoder
- State
- Published
- Severity
- 7.5 High
- Published
- Jan 16, 2026
- Updated
- Sep 17, 2026
- Reserved
- Jan 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
pyasn1pyasn1 |
|
References
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
- https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
- https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
- https://access.redhat.com/security/cve/CVE-2026-23490vdb-entry
- RHBZ#2430472issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23490.json
- https://access.redhat.com/errata/RHSA-2026:4148vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2758vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3959vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:13512vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:54757vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:28042vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3958vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:13508vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:17595vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:17446vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2309vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4138vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1905vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3354vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1906vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4146vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4145vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2483vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4147vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2486vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4144vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2221vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4139vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2303vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4140vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2300vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4142vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2302vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4143vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2299vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4141vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1903vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3359vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1904vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2712vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2453vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2460vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:30088vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:13553vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:13545vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:24866vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:5606vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:17611vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:41928vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:24977vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:42644vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:19712vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37275vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:14020vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39894vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:24476vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:24483vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:4943vendor-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.