Skip to content
OpenAdvisories
High RHSA-2026:4147 1 CVE

Red Hat Security Advisory: python-pyasn1 security update

Published Mar 10, 2026 · Updated Oct 16, 2026

Ecosystem: Red Hat

Fixed packages 6

ReleasePackageFixed in
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::appstream python-pyasn1 0:0.3.7-6.el8_4.1
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::appstream python3-pyasn1 0:0.3.7-6.el8_4.1
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::appstream python3-pyasn1-modules 0:0.3.7-6.el8_4.1
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::appstream python-pyasn1 0:0.3.7-6.el8_4.1
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::appstream python3-pyasn1 0:0.3.7-6.el8_4.1
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::appstream python3-pyasn1-modules 0:0.3.7-6.el8_4.1

Vulnerabilities 1

  • High 7.5
    CVE-2026-23490

    pyasn1 has a DoS vulnerability in decoder

    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.

    pyasn1 pyasn1 open-webui katib-earlystopping Debian Ubuntu Wolfi PyPI

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2430472
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4147.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-23490
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23490
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23490
  • article
    https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
  • article
    https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
  • article
    https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq