Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
7.5
Python PyASN.1 Library Allows Code Execution
RHSA-2026:4139
Summary
A security update has been released for the Python PyASN.1 library, which is used by various applications. If not updated, an attacker could potentially execute malicious code on your system. Update your Python packages to the latest version to fix this vulnerability.
What to do
- Update redhat python-pyasn1 to version 0:0.3.7-6.el8_8.1.
- Update redhat python3-pyasn1 to version 0:0.3.7-6.el8_8.1.
- Update redhat python3-pyasn1-modules to version 0:0.3.7-6.el8_8.1.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| redhat | python-pyasn1 | <= 0:0.3.7-6.el8_8.1 | 0:0.3.7-6.el8_8.1 |
| redhat | python3-pyasn1 | <= 0:0.3.7-6.el8_8.1 | 0:0.3.7-6.el8_8.1 |
| redhat | python3-pyasn1-modules | <= 0:0.3.7-6.el8_8.1 | 0:0.3.7-6.el8_8.1 |
| redhat | python-pyasn1 | <= 0:0.3.7-6.el8_8.1 | 0:0.3.7-6.el8_8.1 |
| redhat | python3-pyasn1 | <= 0:0.3.7-6.el8_8.1 | 0:0.3.7-6.el8_8.1 |
| redhat | python3-pyasn1-modules | <= 0:0.3.7-6.el8_8.1 | 0:0.3.7-6.el8_8.1 |
Original title
Red Hat Security Advisory: python-pyasn1 security update
osv CVSS3.1
7.5
- https://access.redhat.com/errata/RHSA-2026:4139 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_4139.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