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7.5
Python pyasn1 Library Has a Security Issue
RHSA-2026:4142
Summary
The Python pyasn1 library, used by many applications, has a security issue that could allow an attacker to execute malicious code. This issue affects Python applications using pyasn1, so you should update your library to the latest version to prevent potential exploitation.
What to do
- Update redhat python-pyasn1 to version 0:0.4.8-6.el9_2.1.
- Update redhat python3-pyasn1 to version 0:0.4.8-6.el9_2.1.
- Update redhat python3-pyasn1-modules to version 0:0.4.8-6.el9_2.1.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| redhat | python-pyasn1 | <= 0:0.4.8-6.el9_2.1 | 0:0.4.8-6.el9_2.1 |
| redhat | python3-pyasn1 | <= 0:0.4.8-6.el9_2.1 | 0:0.4.8-6.el9_2.1 |
| redhat | python3-pyasn1-modules | <= 0:0.4.8-6.el9_2.1 | 0:0.4.8-6.el9_2.1 |
Original title
Red Hat Security Advisory: python-pyasn1 security update
osv CVSS3.1
7.5
- https://access.redhat.com/errata/RHSA-2026:4142 Vendor Advisory
- https://access.redhat.com/security/updates/classification/#important Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2430472 Third Party Advisory
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4142.j... Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-23490 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-23490 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-23490 Vendor Advisory
- https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970 Third Party Advisory
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2 Third Party Advisory
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq Third Party Advisory
Published: 10 Mar 2026 · Updated: 13 Mar 2026 · First seen: 10 Mar 2026