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    CVE-2026-23490

    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.

    Published:Jan 16, 2026
    Last Modified:Aug 14, 2026
    EPS:Jan 16, 2026
    EPSS Score:0.00679
    CVSS Score:7.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Pyasn1
    Product
    Pyasn1

    Exploits

    No exploit reference

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    References

    https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
    https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
    https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
    https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
    https://access.redhat.com/errata/RHSA-2026:13508
    https://access.redhat.com/errata/RHSA-2026:13512
    https://access.redhat.com/errata/RHSA-2026:13545
    https://access.redhat.com/errata/RHSA-2026:13553
    https://access.redhat.com/errata/RHSA-2026:14020
    https://access.redhat.com/errata/RHSA-2026:17446
    https://access.redhat.com/errata/RHSA-2026:17595
    https://access.redhat.com/errata/RHSA-2026:17611
    https://access.redhat.com/errata/RHSA-2026:1903
    https://access.redhat.com/errata/RHSA-2026:1904
    https://access.redhat.com/errata/RHSA-2026:1905
    https://access.redhat.com/errata/RHSA-2026:1906
    https://access.redhat.com/errata/RHSA-2026:19712
    https://access.redhat.com/errata/RHSA-2026:2221
    https://access.redhat.com/errata/RHSA-2026:2299
    https://access.redhat.com/errata/RHSA-2026:2300
    https://access.redhat.com/errata/RHSA-2026:2302
    https://access.redhat.com/errata/RHSA-2026:2303
    https://access.redhat.com/errata/RHSA-2026:2309
    https://access.redhat.com/errata/RHSA-2026:24476
    https://access.redhat.com/errata/RHSA-2026:24483
    https://access.redhat.com/errata/RHSA-2026:2453
    https://access.redhat.com/errata/RHSA-2026:2460
    https://access.redhat.com/errata/RHSA-2026:2483
    https://access.redhat.com/errata/RHSA-2026:2486
    https://access.redhat.com/errata/RHSA-2026:24866
    https://access.redhat.com/errata/RHSA-2026:24977
    https://access.redhat.com/errata/RHSA-2026:2712
    https://access.redhat.com/errata/RHSA-2026:2758
    https://access.redhat.com/errata/RHSA-2026:28042
    https://access.redhat.com/errata/RHSA-2026:30088
    https://access.redhat.com/errata/RHSA-2026:3354
    https://access.redhat.com/errata/RHSA-2026:3359
    https://access.redhat.com/errata/RHSA-2026:37275
    https://access.redhat.com/errata/RHSA-2026:3958
    https://access.redhat.com/errata/RHSA-2026:3959
    https://access.redhat.com/errata/RHSA-2026:39894
    https://access.redhat.com/errata/RHSA-2026:4138
    https://access.redhat.com/errata/RHSA-2026:4139
    https://access.redhat.com/errata/RHSA-2026:4140
    https://access.redhat.com/errata/RHSA-2026:4141
    https://access.redhat.com/errata/RHSA-2026:4142
    https://access.redhat.com/errata/RHSA-2026:4143
    https://access.redhat.com/errata/RHSA-2026:4144
    https://access.redhat.com/errata/RHSA-2026:4145
    https://access.redhat.com/errata/RHSA-2026:4146
    https://access.redhat.com/errata/RHSA-2026:4147
    https://access.redhat.com/errata/RHSA-2026:4148
    https://access.redhat.com/errata/RHSA-2026:41928
    https://access.redhat.com/errata/RHSA-2026:42644
    https://access.redhat.com/errata/RHSA-2026:4943
    https://access.redhat.com/errata/RHSA-2026:54757
    https://access.redhat.com/errata/RHSA-2026:5606
    https://access.redhat.com/security/cve/CVE-2026-23490
    https://bugzilla.redhat.com/show_bug.cgi?id=2430472
    https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23490.json

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High