Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
7.5
Python PyASN1 Vulnerability: Data Exposure
RHSA-2026:4148
Summary
A security update is available for Python's PyASN1 library, which could allow an attacker to access sensitive information. This update is important for systems using Python and PyASN1, as it prevents an attacker from accessing potentially sensitive data. Systems administrators should update their Python installations to ensure they have the latest security patches.
What to do
- Update redhat python-pyasn1 to version 0:0.1.9-7.el7_9.2.
- Update redhat python2-pyasn1 to version 0:0.1.9-7.el7_9.2.
- Update redhat python2-pyasn1-modules to version 0:0.1.9-7.el7_9.2.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| redhat | python-pyasn1 | <= 0:0.1.9-7.el7_9.2 | 0:0.1.9-7.el7_9.2 |
| redhat | python2-pyasn1 | <= 0:0.1.9-7.el7_9.2 | 0:0.1.9-7.el7_9.2 |
| redhat | python2-pyasn1-modules | <= 0:0.1.9-7.el7_9.2 | 0:0.1.9-7.el7_9.2 |
Original title
Red Hat Security Advisory: python-pyasn1 security update
osv CVSS3.1
7.5
- https://access.redhat.com/errata/RHSA-2026:4148 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_4148.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