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7.5
Python PyASN.1 Library Vulnerability: Data Exposure
RHSA-2026:4145
Summary
The Python PyASN.1 library is used by various applications, including some in the Red Hat ecosystem. An attacker could use this vulnerability to expose sensitive information. Update your Python packages to the latest version to fix this issue.
What to do
- Update redhat python-pyasn1 to version 0:0.3.7-6.el8_2.1.
- Update redhat python3-pyasn1 to version 0:0.3.7-6.el8_2.1.
- Update redhat python3-pyasn1-modules to version 0:0.3.7-6.el8_2.1.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| redhat | python-pyasn1 | <= 0:0.3.7-6.el8_2.1 | 0:0.3.7-6.el8_2.1 |
| redhat | python3-pyasn1 | <= 0:0.3.7-6.el8_2.1 | 0:0.3.7-6.el8_2.1 |
| redhat | python3-pyasn1-modules | <= 0:0.3.7-6.el8_2.1 | 0:0.3.7-6.el8_2.1 |
Original title
Red Hat Security Advisory: python-pyasn1 security update
osv CVSS3.1
7.5
- https://access.redhat.com/errata/RHSA-2026:4145 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_4145.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